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2 years ago

Help with both please ;-;

Mathematics

2 answers:

Schach [20]2 years ago

4 0

Volume = l*b*h

1. Ans 24 unit cubes

Because it had 6 unit cubes as length, 2 unit cunes as breadth and 2 unit cubes as height.

2. Volume = l*b*h
= 30*15*4
=1800 cubic feet

lilavasa [31]2 years ago

3 0

The first one is 24 unit cubes because all you need to do is count the amount of cubes the cuboid has. Unfortunately I have no idea how to do the second one

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The crop yield increased by 9 pounds per acre from year 1 to year 10.

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To solve this we are using the average rate of change formula: $Av=\frac{f(x_2)-f(x_1)}{x_2-x_1}$ , where:

$x_2$ is the second point in the function

$x_1$ is the first point in the function

$f(x_2)$ is the function evaluated at the second point

$f(x_1)$ is the function evaluated at the first point

We know that the first point is 1 year and the second point is 10 years, so $x_1=1$ and $x_2=10$ . Replacing values:

$Av=\frac{-(10)^2+20(10)+50-[-(1)^2+20(1)+50]}{10-1}$

$Av=\frac{-100+200+50-[-1+20+50]}{9}$

$Av=\frac{150-[69]}{9}$

$Av=\frac{150-69}{9}$

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

$Av=9$

Since $f(x)$ represents the number of pounds per acre and $x$ the number of years, we can conclude that the crop yield increased by 9 pounds per acre from year 1 to year 10.

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