Acone-shaped pile of gravel has a diameter of 30 m and a height of 9.1 m.
which estimate best approximates the volume of the pile of gravel?
2120 m³
2600 m³
6360 m³
8480 m³

 The correct option is (A) 2120 m³.

Step-by-step explanation:  Given that a cone-shaped pile of gravel has a diameter of 30 m and a height of 9.1 m.

We are to select the correct option that estimate best approximates the volume of the pile of gravel.

The VOLUME of a cone with radius 'r' units and height 'h' units is given by the formula:

In the given cone-shaped pile, diameter of gravel is 30 m, so its radius will be

and height, h = 9.1 m.

Therefore, the volume of the cone-shaped pile is

Out of the given options, only 2120 is the nearest one, so the best approximate will be 2120 m³.

Thus, (A) is the correct option.

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

she was supposed to add the hours(38.5) and multiply the amount of money she earned(7.50) resulting in $288.75 .

correct me if i'm wrong and if it is i'm truly sorry.