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3 years ago

5

About 5 - 6% of the student population has more than 3 pets. If the student population is 450 people, how many would have more t

han 3 pets?

2 answers:

Travka [436]3 years ago

6 0

Answer:

300

Step-by-step explanation:

NeX [460]3 years ago

6 0

27 students is the answer

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The mean of four numbers is 30 are 12,50 and 48 what is the fourth number.a)129 b) 10 c) 12 d)30

cricket20 [7]

10 is the answer.
You know that there are 4 numbers and you have to add the numbers then divide them by four to get the mean. So all you have to do is reverse the steps, multiply 30 by 4 to get 120, then add 12+50+48 to get 110. Then subtract, 120-110=10. To check if it is correct add 12, 50, 48, and 10 to get 120, then divide by 4 to get 30. And voila, there is the answer. I hope this helped for future problems like this one.

3 0

4 years ago

A farmer is tracking the amount of corn his land is yielding each year. He finds that the function f(x) = −x2 + 20x + 50 models

zysi [14]

Answer:

The crop yield decreased by 0.09 pounds per acre from year 1 to year 10

Step-by-step explanation:

The function that models the crops in pounds per acre over x years is

$f(x)=-x^2+20x+50$

In year 1, the crop yield is $f(1)=-(1)^2+20(1)+50=69$

In year 10, the crop yield is $f(10)=-(10)^2+20(10)+50=150$

The average rate of change from year 1 to year 10 is given by:

$\frac{f(10)-f(1)}{10-1}$

We substitute the values to get:

$\frac{150-69}{10-1}$

$=\frac{81}{9}=9$

Since the average rate of change is positive, the crop yield decreased by 0.09 pounds per acre from year 1 to year 10.

3 0

3 years ago

Read 2 more answers

What is the interquartile range for team b?

mestny [16]

I think team red maybe

6 0

3 years ago

is 3240 a perfect cube? if not then by which smallest number should 3240 be multiplied so that the product is a perfect cube?

Debora [2.8K]

Answer:

<h2>3240 it's not a perfect cube.</h2><h2>The smallest number should 3240 be multiplied so that the product is a perfect cube is 15² = 225.</h2>

Step-by-step explanation:

3240 is a perfect cube if 3240 = n³ (n ∈ N).

Use the Prime Factorization:

$\begin{array}{c|c}3240&2\\1620&2\\810&2\\405&5\\81&3\\27&3\\9&3\\3&3\\1\end{array}\\\\3240=2\cdot2\cdot2\cdot5\cdot3\cdot3\cdot3\cdot3=2^3\cdot3^3\cdot5\cdot3=(2\cdot3)^3\cdot5\cdot3=6^3\cdot5\cdot3$

$3240=6^3\cdot15\qquad\text{multiply both sides by}\ 15^2\\\\3240\cdot15^2=6^3\cdot15^3=3240\cdot15^2=(6\cdot15)^3=90^3$

Used:

$a^n\cdot a^m=a^{n+m}\\\\(ab)^n=a^nb^m$

5 0

3 years ago

What is the answer for this problem -52 = 4(3n-1)

kolezko [41]

Answer: n =-4

Step-by-step explanation:

-52 = 4(3n -1) Apply the distributive property

-52 = 12n -4

+4 +4

-48 = 12n

n = -4

4 0

3 years ago