On average, a person’s heart beats about 4.2×107 times per year. There are about 7,600,000,000 people in the world. Use this data to approximate the number of heartbeats for all the people in the world per year. Expressing your answer in scientific notation in the form a×10b, what are the values of a and b?

Answers

Answer 1

Answer:

a=3.192  b=17

Step-by-step explanation:

I just used a graphing calculator to multiply the req. numbers


Related Questions

Jeremey performs the same operations on four values of x. He records each resulting y-value in a table, as shown below. Which equation shows the operations Jermey performs on x to get to y

Answers

Answer:

Y=4x-3

Explanation: If we look 2 = 5 We can do 4(2)= 8 -3 = 5 So that the answer and 4(4)= 16-3 = 13 so these are the Y so this is the answer!

Write a story to represent the division problem 15÷ 1/9

Answers

Answer:

Katherine is a nurse and has 15 feet of bandages. One of her patients was injured and needed 1/9 of the bandages she had. How many feet of bandages did she use on her patient?

Step-by-step explanation:

Math, Stumped me once more

Answers

Answer:

[tex]B.Alternate\ Exterior\ Angles[/tex]

Step-by-step explanation:

[tex]As\ the\ exterior\ angles\ lie\ on\ the\ opposite\ sides\ of\ the\ transversal,\\that\ cuts\ two\ parallel\ lines,\ the\ set\ of\ 'Alternate\ Exterior\ Angles'\ formed\\are\ equal.[/tex]

can anyone help me ?

Answers

Answer: m∠T = 48°

ΔMAT has MA = MT

=> ΔMAT is a isosceles triangle at M

=> ∠A = ∠T = (180° - ∠M)/2

=> x + 20  = (180 - 3x)/2

⇔ 2x + 40 = 180 - 3x

⇔ 5x = 140

⇔ x = 140/5

⇔ x = 28

=> ∠A = ∠T = 28 + 20 = 48°

Step-by-step explanation:

HELP ILL MARK BRAINLIEST

Answers

Answer:

5.3f

Step-by-step explanation:

***If you found this answer please press the heart button and mark me brainliest, thanks!***

solve for all the values of the interior angles​

Answers

Answer:

x = 6

Step-by-step explanation:

measure of angle E: 5(6) + 8 = 38

measure of angle D: 6(6) + 8 = 44

measure of angle C:  180 - 82 = 98

check answers by adding all 3 angle measures to make sure they equal 180 degrees  

Find the volume of a pyramid with a square base, where the side length of the base is
14.4 m and the height of the pyramid is 15.3 m. Round your answer to the nearest
tenth of a cubic meter.

Answers

Answer:

Volume of pyramid with square base is 1057.54 m³

Step-by-step explanation:

We are given:

Length of base of pyramid = 14.4 m

Height of pyramid = 15.3 m

We need to find:

Volume of pyramid with square base

The formula used is: [tex]Volume=\frac{1}{3}\times a^2 \times h[/tex]

Where a = base of pyramid and h is height

Putting values and finding volume

[tex]Volume=\frac{1}{3}\times a^2 \times h\\Volume=\frac{1}{3}\times (14.4)^2 \times (15.3)\\Volume=\frac{1}{3}\times 207.36 \times 15.3\\Volume=1057.54 \ m^3[/tex]

So, Volume of pyramid with square base is 1057.54 m³

Answer:

1057.5

Step-by-step explanation:

Which phrase explains how a range of fault-block mountains forms???

Answers

Answer:

The Fault-block Mountains or block mountains are created when faults or cracks in the Earth's crust force materials or blocks of rocks upward or down. The uplifted blocks are Block Mountains or horsts. The intervening dropped blocks are called graben, which can be small or form rift valley systems.

Step-by-step explanation:

Answer:

Tension affects a wide area of crust and causes many normal faults.

Step-by-step explanation:

Write a linear expression in simplest form to represent the perimeter of the triangle.

Answers

Answer:

x +5

Step-by-step explanation:

5x-2+3x+4+2x+9

5x-2x=3x

3x-3x=x

-2+2=0

0+4=4

4-9 =5

#15, what is this answer ?

Answers

Answer:

43.39

Step-by-step explanation:

It's easy division/

NEEDING HELP ASAP!
*CLICK ON PHOTO*
!SHOW ALL WORK!

Answers

-6x-2y=42

x-y=-15

Multiply x-y=-15 by 6 ( eliminate the x first)

6(x-y)=6(-15)

(6)(x)=6x

(6)(-y)=-6y

6(-15)=-90

-6x-2y=42

6x-6y=-90

eliminate x the systems of equations by subtracting

-6x+6x-2y+-6y=42-90

-2y-6y=42-90

-8y=-48

divide both sides by -8 to get y by itself

-8y/-8=-48/8

y=6

Find x by substitution method

use y=6 into one of the system of equations

x-y=-15

x-6=-15

move -6 to the other side

sign changes from -6 to +6

x-6+6=-15+6

x=-15+6

x=-9

answer:

(-9,6)

identify the slope and write the equation of the line .

Answers

Answer:

y=-2x+5; slope is -2

Step-by-step explanation:

slope is rise/run. we can see it rises 2 and goes left one which would give us rise/run=2/-1=-2. that is our slope.

using y=mx+b to write the equation, m is slope and b is the y-int.. we can see that the y-int. is (0,5). we can plug 5 into b.

plugging b and m in we can get the equation: y=-2x+5

1) what is one half of 30?
2) what is two thirds of 15 miles?​

Answers

Answer:

15 and 10 miles

Step-by-step explanation:

one half of 30 = 15

two thirds of 15 miles =10 miles

1)15
2)5

One half of 30 is 15, and two thirds of 15 is 5.

Jeanie buys 4 pairs of jeans at "x" dollars each and a shirt for $5.99. Her total
purchase is $77.95. What is the cost of each pair of jeans?

Answers

Answer:

each pair of jeans costs $17.99

please help!!

What is the experimental probability of drawing a red marble, given the following results?

blue: 8
green: 5
red: 7

a. 7/13
b. 13/20
c. 7/20
d. 7/8

Answers

Answer:C

Step-by-step explanation: You want to add up all the marbles, and then take the red marbles and divide by all the marbles 7/20

please help me out thanks ​

Answers

Answer:

I think it would be either $134.89 or 113.22

Step-by-step explanation:

just from an estimate, I got close to one of these two

anyone please help!!!​

Answers

Answer:

11

Step-by-step explanation:

Answer:22(a)

Step-by-step explanation:22 is a factor of 66

Use intercepts to graph the linear equation 5x + 3y = 30.

Answers

Answer x=6 and y=10

Explanation:

Replace each variable in turn with 0 and solve

5x+3y=30  Put zero in place of x and solve for y

5(0)+3y=30

[tex]\frac{3y}{3} =\frac{30}{3}[/tex]

y=10 The y- intercept is 10

5x+3y=30 Put zero in place of y and solve for x

5x+3(0)=30

[tex]\frac{5x}{5} =\frac{30}{5}[/tex]

x=6  The x-intercept is 6

Compute: (√2 )^5−( √2 )^4+( √2 )^3−(√2 )^2+√2 −(√2 )^0

Answers

Answer:

2.89949493661

Step-by-step explanation:

Hope i helped! Have a wondeful weekend! :)

Answer: 2.899494936610

Step-by-step explanation:

The price of a pair of sunglasses was reduced from $55 to $33. By what percentage was the price of the sunglasses reduced?

Answers

22% because the doubt know

Square A has an area of 18a2 + 862 – 24ab.
Square B has an area of (3a – 2b)2
Determine which square has a greater area? Explain your answer.

Answers

I don’t know but you can go download Conects. :)

You buy two packages of almonds and mix them together into one bowl one package is 8.24 kg and the other is 6.62 kg. How much is in the bowl

Answers

Answer:

8.24+6.62=14.86

Use the coordinates J(7, 8), K(1, 2) and L(5, 2) for △JKL.

The centroid for △JKL is at point M. What is JM rounded to the nearest tenth?

Answers

prolly D

..............................

The distance between the point JM will be 4.81 units.

What is the centroid of the triangle?

In science and math, the centroid of a planar figure or firm figure, also known as the point of intersection or center of the figure, is the mean absolute position of all of the other points on the subject's surface.

The centroid of the triangle is given as,

(x, y) = [(x₁ + x₂ + x₃) / 3, (y₁ + y₂ + y₃) / 3]

Use the coordinates J(7, 8), K(1, 2) and L(5, 2) for △JKL. Then the centroid for △JKL is at point M is given as,

(x, y) = [(7 + 1 + 5) / 3, (8 + 2 + 2) / 3]

(x, y) = (13/3, 12/3)

(x, y) = (13/3, 4)

Then the distance between the point JM is calculated as,

D² = (13/3 - 7)² + (4 - 8)²

D² = 7.1111 + 16

D² = 23.11

D = √23.11

D = 4.81 units

The distance between the point JM will be 4.81 units.

More about the centroid of the triangle link is given below.

https://brainly.com/question/10708357

#SPJ2

Which calculation will give the best estimate of the result of 23 x 4.8?
0 20 0.5
0 30 x 0.5
O 20 x 5
O 30 x 5

Answers

Answer:

20x5

Step-by-step explanation:

will give brainiest pls help

Answers

Answer: b

Step-by-step explanation:

B

Answer:

The American Revolutionary War (1775–1783), also known as the American War of ... Britain remained under siege in Gibraltar but scored a major victory over the French navy. ... in America, and the colonial legislatures argued that they had exclusive right .... Howe then seized control of New York City on September 15

Step-by-step explanation:

A squirrel burrowed 6 holes in 2 minutes. How many holes could the squirrel burrow in 7 minutes

Answers

Answer:

He burrows 6 holes in 2 minutes which means that he can burrow 3 holes in 1 minute.

To determine how many he can burrow in 7 minutes, you would multiply the

unit rate of 3 holes in 1 minute by 7.

He would burrow 21 holes in 7 minutes.

Step-by-step explanation:

brainliest pls?

Answer:

He burrows 6 holes in 2 minutes which means that he can burrow 3 holes in 1 minute.

therfore your answer would be 21 holes in 7 minutes

Step-by-step explanation:

Ray earns $15 an hour for up to 40 hours a week. If he works more than 40 hours a week, he is paid time and a half. That means Ray is paid 150% of his hourly wage for every hour he works over 40 hours.
How much additional money does Ray earn for every hour he works over 40 hours?
Last week, Ray worked 46 hours. He incorrectly calculated he earned $45 of additional pay. What was Ray’s error when he miscalculated his overtime pay? Explain your answer.
How much was Ray’s paycheck for working 46 hours? Show your work.
Would Ray make more money working 40 hours a week for two weeks or working 32 hours one week and 46 hours the next? Justify your solution.

Answers

46 is your correct answer bc 30 plus 16 is 46

For every hour he works over 40 hours, he is paid an additional $7.50.

Ray’s error when he miscalculated his overtime pay is +$45.

How to calculate the error?

Suppose the actual value and the estimated values after the measurement are obtained. Then we have:

Error = Actual value - Estimated value

His normal pay is $15/h

150%/100 = 1.5

Multiply his normal pay by the rate in decimal form;

$15 X 1.5 = $22.5

His OT pay is $22.5/h.

Additional money = (OT pay) - (Normal pay)

= $22.5 - $15

= $7.5

Or $7.5 = $7.50

Thus, For every hour he works over 40 hours, he is paid an additional $7.50.

Ray actual pay for the week was $100 then from the question he incorrectly calculated it as {$100 + $45} = $145 which is $45 above his actual pay.

Error = measured value - actual value.

Error = $145 -$100 =$45.

Since the value $145 is greater than his actual pay $100, we have to include a positive sign to the error $45.

Therefore, Error = +$45.

Learn more about this concept here;

https://brainly.com/question/14497100

#SPJ6

please help me :)
2)
A newspaper started an online version of its paper 14 years ago. In a recent presentation to stockholders, the lead marketing executive states that the revenues for online ads have more than doubled that of the revenues for printed ads since starting the online version of the paper.

part A. Use the graph below to justify the lead executive’s statement.

part B. Determine the approximate year that the two ad revenues were equal.

Answers

Answer:

Part B= (7.5 years, 2.25ish dollars) or about (7,2)

Step-by-step explanation:

im sorry i couldn't answer part b

x - 15 = -25
plz help

Answers

Answer:

x=-10

Step-by-step explanation:

For any rectangle ABCD, determine whether each statement is always, sometimes, or never true. ∠a≅∠b

Answers

Answer:

always

Step-by-step explanation:

no matter what the angles of a rectangle will be 90 degrees so the answer is always

Answer:

Step-by-step explanation:

Consecutive angles are equal only when dealing with a square or a rectangle. All other 4 sided figures do not have this property.

So the answer is sometimes.

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