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Open Up - Grade 7 - Mathematics - Unit 7 - Lesson 16

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"Source: Open Up Resouces (Download for free at openupresources.org.)"

Pitanje 1
1.

A landscape architect is designing a pool that has this top view:

How much water will be needed to fill this pool 4 feet deep?

Pitanje 2
2.

A landscape architect is designing a pool that has this top view:

Before filling up the pool, it gets lined with a plastic liner. How much liner is needed for this pool?

Pitanje 3
3.

A landscape architect is designing a pool that has this top view:

Here are the prices for different amounts of plastic liner. How much will all the plastic liner for the pool cost?

(Round to the nearest cent)

Pitanje 4
4.

Shade in a base of the trapezoidal prism. (Be careful! The base is not the same as the bottom.)(Show Your Work)

Find the area of the base you shaded.(Short Answer)

Pitanje 5
5.

Use the picture of the prisim to solve the problem.

Find the volume of this trapezoidal prism.(Short Answer)

Pitanje 6
6.

For each diagram, decide if y is an increase or a decrease of x.

Then determine the percentage that x increased or decreased to result in y.(Round to the nearest whole percent.)

Pitanje 7
7.

For each diagram, decide if y is an increase or a decrease of x.

Then determine the percentage that x increased or decreased to result in y.(Round to the nearest whole percent.)

Pitanje 8
8.

For each diagram, decide if y is an increase or a decrease of x.

Then determine the percentage that x increased or decreased to result in y.(Round to the nearest whole percent.)

Pitanje 9
9.

For each diagram, decide if y is an increase or a decrease of x.

Then determine the percentage that x increased or decreased to result in y.(Round to the nearest whole percent.)

Pitanje 10
10.

Noah is visiting his aunt in Texas. He wants to buy a belt buckle whose price is $25. He knows that the sales tax in Texas is 6.25%.

How much will the tax be on the belt buckle?(round to the nearest cent)

Pitanje 11
11.

Noah is visiting his aunt in Texas. He wants to buy a belt buckle whose price is $25. He knows that the sales tax in Texas is 6.25%.

How much will Noah spend for the belt buckle including the tax?(round to the nearest cent)

Pitanje 12
12.

Noah is visiting his aunt in Texas. He wants to buy a belt buckle whose price is $25. He knows that the sales tax in Texas is 6.25%.

Write an equation that represents the total cost, c, of an item whose price is p.