Hello please help i’ll give brainliest

Mathematics

1 answer:

poizon [28]3 years ago

6 0

Answer:

an organism killing another organism for food

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The junior class of Eastlake High School has 146 students, and 67 of them are girls. How many boys are there in the class?

Katena32 [7]

Hello!

In order to find how many boys there are in the class simply subtract 67 from 146:

146-67= 79

There are 79 boys in the class

I hope it helps!

6 0

3 years ago

What is the average speed in miles per hour if a driver has traveled 8 miles in 10 minutes?

Contact [7]

Answer:

48 MPH

Step-by-step explanation:

10 mins times 6= 60 mins which is an hour

8 miles times 6= 48 miles

This means the average is 48 MPH

8 0

3 years ago

A student is trying to calculate the density of a ball. She already knows the mass, but she needs to determine the volume as wel

mario62 [17]

<h2>Answer and Explanation:</h2><h2 />

The density of a substance is defined as its mass per unit volume. In a mathematical language, this can be written as follows:

$\rho=\frac{m}{V} \\ \\ \\ Where: \\ \\ \rho: \ density \\ \\ m:mass \\ \\ V:Volume$

From the problem, a student is trying to calculate the density of a ball. She already knows the mass, but is facing a problem because she also needs to find the volume. From geometry, we know that the volume of a sphere is:

$V=\frac{4}{3} \pi r^{3}$

Since a ball is a sphere, then the student can use this formula. She just need to measure the radius of the ball and compute the Volumen, then she have to plug both the value of the mass and the value of the Volume in the equation $\rho=\frac{m}{V}$ . An easy way to find the radius is to take the measure of the diameter of the ball and divide that value by 2.