Answer:
45% of the students prefer biology
Step-by-step explanation:
Let's read and write all the data from the question.
100 students are interviewed to see which of biology, chemistry and physics they prefer.
Therefore, we have three categories to classify the students :
A student that prefers biology
A student that prefers chemistry
And a student that prefers physics
52 of the students are girls. Therefore,
students are boys.
29 of the girls like biology best. In order to answer the question, we will only need the amount of boys that prefer biology and sum them to the amount of girls that like biology best.
24 of the boys prefer physics. Therefore,
is the sum of the boys that prefer chemistry and biology.
If 24 is the sum of the boys that prefer chemistry and biology ⇒
are boys that prefer biology.
If we sum is the number of students that prefer biology.
If we want to calculate the percentage we need to divide the amount of students that prefer biology by the total of students interviewed and then multiply that number by 100 :
%
45 % of the students prefer biology.
SOMEONE HELP!!!!!! Don’t use what websites! And please like list answer 1,2,3, and 4
Answer:
1. 24 2. 20 3. 1.75(I think) 4. 11
Step-by-step explanation:
3 might be incorrect but The others seem more correct than ever :)
help pls i forgot how to solve this
Answer:
x = 45
Step-by-step explanation:
Brainliest Please!
Please answer! I will mark you Brsinliest! The pictures are together.
Answer:
V = 65.97π
Step-by-step explanation:
Answer:
g00gle is a really great source for these questions!
Just put in the information and they do they work!
Step-by-step explanation:
66 inches cubed since you round up .03 decimals!
or 65.97 if you aren't supposed to round
In Exercises 1 and 2, determine whether the triangles are similar. If they are,
write a similarity statement. Explain your reasoning.
Answer:
1) yes, all of their angles are equal. (75°, 45°, and 60°)
2) No, their angles are not equal. (42°, 48°, 90° vs 58°, 32°, 90°)
Step-by-step explanation:
1.
ΔWXY and ΔRST are similar because they have equal angles.
2.
ΔJKM and ΔKLM are not similar because the angles are not equal.
What is a triangle?A triangle is a 2-D figure with three sides and three angles.
The sum of the angles is 180 degrees.
We can have an obtuse triangle, an acute triangle, or a right triangle.
We have,
1.
In ΔWXY,
∠X = 75
∠Y = 60
∠W = 180 - (75 + 60) = 180 - 135 = 45
In ΔRST,
∠S = 45
∠R = 60
∠T = 180 - (45 + 60) = 180 - 105 = 75
Now,
We can say that,
ΔWXY and ΔRST are similar because they have equal angles.
2.
In ΔJKM,
∠J = 42
∠M = 45
∠K = 180 - (42 + 45) = 180 - 87 = 93
In ΔKLM,
∠K = 58
∠M = 90
∠L = 180 - (58 + 90) = 180 - 148 = 132
ΔJKM and ΔKLM are not similar because the angles are not equal.
Thus,
ΔWXY and ΔRST are similar because they have equal angles.
ΔJKM and ΔKLM are not similar because the angles are not equal.
Learn more about triangles here:
https://brainly.com/question/25950519
#SPJ2
The diagram shows the distance between my home, H, and two towns, A and B.
It also shows information about journey times.
A
H
10 miles
Journey time
20 minutes
20 miles
Journey time
30 minutes
a)
What is the average speed of the journey from my home town to A?
b)
What is the average speed of the journey from my home town to B?
C
I drive from town A to my home and then to town B.
The journey time is 50 minutes.
What is my average speed?
Answer:
10 MILES
20 MINUTES
20 MILES
30MINUTES
Answer:
a)30 mph
b.)40 mph
c.)36mph
Step-by-step explanation:
The results of a survey show that baseball is the favourite sport for 18 out of 25 people what is the percent probability for this?
DONT SEND A LINK
Answer:
72%
Step-by-step explanation:
A smart freind of mi e says this is the answer
What is the range of their ages?
41
40
37
Answer:
41-37=4
Answer: 4
Step-by-step explanation:
Answer:
4
Step-by-step explanation:
The area of a rectangle is 140 ft. The length of one side is 10 ft. What is the width?
FAST PLEASE
Answer:
14
Step-by-step explanation:
Leslie wants to buy as many
bookmarks as she can at the book fair.
Each costs 75 cents. If she brings
$5.50, how many can she afford?
OL
4. Find x. Then find each indicated measure.
Answer:
[tex]x=4\\\\EG=9\\\\ED=18[/tex]
Step-by-step explanation:
[tex]\dfrac{x+5+9}{x+5}=\dfrac{12}{6}\\\\\dfrac{x+14}{x+5}=2\\\\x+14=2(x+5)\\\\x+14=2x+10\\\\14-10=2x-x\\\\x=4\\\\EG=4+5=9\\\\ED=9+9=18[/tex]
A bag of coins contains pennies and nickels. There are 40 coins in all. The total value of the coins is $0.72. How many coins are pennies, and how many are nickels? Write 2 equations.
Answer:
Step-by-step explanation:
A penny is worth 1 cent. = 0.01p
A nickel is worth 5 cents = 0.05n
Let the number of pennies = x
Number of nickels = y
A bag of coins contains pennies and nickels. There are 40 coins in all. The total value of the coins is $0.72. How many coins are pennies, and how many are nickels? Write 2 equations.
hey can someone help me pls immediately!!! i’ll mark brainiest if u don’t guess or leave links. pls don’t guess tho actually know it if ur going to say the answer
Answer:
$9
Step-by-step explanation:
Answer:
$9
Step-by-step explanation:
between 2 and 4 is 3 sandwiches.
There is a point at 3 and 9
(3,9) $9 for 3 sandwiches
Can you please help me
Answer:
Yes, they are necessary because it tells you where you need ti start 1st in the equation you are trying to solve.
you can also go by the PEMDAS
Parenthesis
Exponents
Multiply
Divide
Add
Subtract.
that is how i learned it.
Hope this helps
A football team plays 15 games per season. It has won 3 of its first 5
games. If the team maintains the same win/lose ratio, how many more
games will the team win?
encuentra el desarrollo exponencial de cada número 87 69 08
Answer:
.
Step-by-step explanation:
Simplify this expression
(√2+√3)(√5 -√7)
Answer:
Step-by-step explanation:
Answer:
pretty sure its the second one
Step-by-step explanation:
Celeste used 20 inches of ribbon from a spool that holds 36 inches of ribbon. What is the decimal equivalent for the amount of ribbon Celeste uses.
Answer: 0.56
Step-by-step explanation:
The spool holds a total of 36 inches of ribbon and out tis amount, Celeste used 20 inches of ribbon.
Celeste therefore used 20 / 36 of the ribbon available from the stool.
In decimal this is:
= 20 ÷ 36
= 0.5556
= 0.56
A triangle has an area of 8 cm2 and a base of
3 cm. What is the height of the triangle?
Show your work!
Answer:
h = 1 1/3
Step-by-step explanation:
So when we divide base x height by two we get
Lets multiply 8 x 2
16
So now lets divide by 3
16 / 3 = 1 1/3
If my answer is incorrect, pls correct me!
If you like my answer and explanation, mark me as brainliest!
-Chetan K
i need help please help me
State whether the following is true or false. If it is false make it true :
24 < 6 + 9
Answer:
Its false 24>6+9
Step-by-step explanation:
6+9=15
Red lights flash every 6 seconds. Blue lights flash every 8 seconds. The store owner turns on the lights. After how many seconds will the lights flash at the same time for the first time
The first and last terms in a proportion are called the
amar
Answer:
What is a Proportion? The four numbers a, b, c and d are known as the terms of a proportion. The first a and the last term d are referred to as extreme terms while the second and third terms in a proportional are called mean terms.
Step-by-step explanation:
Answer:
False
Step-by-step explanation:
What is 1?1?1?1=6 pls help my brain id hurt rn
Answer:
(1+1+1)!*1=6
Step-by-step explanation:
Boat A and Boat B are racing across a bay. Boat A is 6 miles ahead of Boat B. Boat A has a top speed of 36 miles per hour, but Boat B has a top speed of 44 miles per hour.
Part A:
If both boats are traveling at their top speeds, how long will it take Boat B to catch up with Boat A?
Part B:
How far will Boat B have traveled when it has caught up to Boat A?
Answer:
45 min = 0.75 hours
Step-by-step explanation:
Since Boat A is 6 miles ahead of boat B and has a top speed of 36 miles per hour, the distance it moves in time, t is d = 6 + 36t where 36t is the distance it moves in time, t with speed 36 miles per hour.(36t = 36 miles per hour × t hours)
Also, since Boat B has a top speed of 44 miles per hour, the distance d' it moves in time, t with this speed is
d'= 44t (44t = 44 miles per hour × t hours)
When Boat B catches up with Boat A, their distances are equal. So,
d = d'
6 + 36t = 44t
subtracting 36t from both sides, we have
44t - 36t = 6
simplifying
8t = 6
dividing through by 8, we have
t = 6/8 hours
t = 0.75 hours
t = 0.75 × 60 min
t = 45 min
I need to explain what 2 reasons why [tex]f(x)=x^{2} +4[/tex] has no real zeros. im very confused anything helps :)
Answer:
Answer in explanation
Step-by-step explanation:
The graph of f does not cross the x-axis. We know this because for any value x, we always get that x^2+4 is positive. x^2 is positive or zero ( 0 or greater than 0) for any x but adding 4 to it makes It 4 or greater than 4.
The discriminant is negative.
That is, b^2-4ac is negative.
Upon comparing ax^2+bx+c to x^2+4 we see that a=1, b=0, and c=4..
Plugging those into b^2-4ac gives
(0)^2-4(1)(4)
=0-16
=-16.
Negative discriminant implies two nonreal zeros so it will not cross the x-axis.
(Positive discriminant implies 2 real and zero discriminant imples 1 real.)
i really need help please (links will be reported)
Answer: all the ones that do not have a negative sign in front easy.
Evaluate the function f(x)=-5x2 + 4x -6
when x = 2
f(x)=-5x2+4x-6
f(2)= -5*2*2+4*2-6
f(2)= -20+2
f(2)=-18
Find the volume of the figure below. Leave answer in terms of PIE Round to the nearest hundredth if necessary
3 9/12 + (4 7/12 + 5/12) = 3 9/12 + ____?
Answer:
5
Step-by-step explanation:
4 7/12 + 5/12 = 4 12/12 which equals 5
Answer:
3 9/12 + (4 7/12 + 5/12) = 3 9/12 + 5
Step-by-step explanation:
Bt= 8500 *(8/27)^t/3After a special medicine is introduced into a Petri dish full of bacteria, the number of bacteria remaining in the dish decreases rapidly.
Answer:
Every 1.71 seconds, the bacteria loses [tex]\frac{1}{2}[/tex]
Step-by-step explanation:
Given
[tex]B(t) = 8500 * (\frac{8}{27})^\frac{t}{3}\\[/tex]
Required [Missing from the question]
Every __ seconds, the bacteria loses [tex]\frac{1}{2}[/tex]
First, we model the function from t/3 to t.
[tex]B(t) = 8500 * (\frac{8}{27})^\frac{t}{3}\\[/tex]
Apply law of indices
[tex]B(t) = 8500 * (\frac{8^\frac{1}{3}}{27^\frac{1}{3}})^t[/tex]
Evaluate each exponent
[tex]B(t) = 8500 * (\frac{2}{3})^t[/tex] --- This gives the number of bacteria at time t
At time 0, we have:
[tex]B(0) = 8500 * (\frac{2}{3})^0[/tex]
[tex]B(0) = 8500 * 1[/tex]
[tex]B(0) = 8500[/tex]
Let r be the time 1/2 disappears.
When 1/2 disappears, we have:
[tex]B(r) = \frac{B(0)}{2}[/tex]
[tex]B(r) = \frac{8500}{2}[/tex]
[tex]B(r) = 4250[/tex]
So, we have:
[tex]B(t) = 8500 * (\frac{2}{3})^t[/tex]
Substitute r for t
[tex]B(r) = 8500 * (\frac{2}{3})^r[/tex]
Substitute [tex]B(r) = 4250[/tex]
[tex]4250 = 8500 * (\frac{2}{3})^r[/tex]
Divide both sides by 8500
[tex]\frac{4250}{8500} = (\frac{2}{3})^r[/tex]
[tex]\frac{1}{2} = (\frac{2}{3})^r[/tex]
Take log of both sides
[tex]log(\frac{1}{2}) = log (\frac{2}{3})^r[/tex]
Apply law of logarithm
[tex]log(\frac{1}{2}) = r\ log (\frac{2}{3})[/tex]
Make r the subject
[tex]r = log(\frac{1}{2}) / log (\frac{2}{3})[/tex]
[tex]r = \frac{-0.3010}{-0.1761}[/tex]
[tex]r = 1.71[/tex]
Hence, it reduces by 1/2 after every 1.71 seconds
Answer:
Every second, the number of bacteria is multiplied by a factor of 0.67
Step-by-step explanation:
Let's rewrite the base so that the exponent is just t.
(8/27)^t/3=((8/27)^1/3)t=(2/3)^t
Therefore, we can rewrite the modeling function as follows.
B(t)=8500⋅(2/3)t
According to this model, the number of bacteria is multiplied by 2/3 every second. Rounding this to two decimal places, we get 2/3 ≈0.67