8th grade semester review

James and Annette invested money into separate accounts at the same time. • James invested $8,000 into an account that earns 5% annual simple interest. • Annette invested $8,000 into an account that earns 5% interest compounded annually. Neither makes any additional deposits or withdrawals. What is the difference in their account balances at the end of 4 years?

• $25.40

• $160.50

• $124.05

• $600.55

Ms. Jahema opened an account with a deposit of $5,000.

*The account earned annual simple interest with a rate of 7%. 

*She did not make any additional deposits or withdrawals. 

What was the interest earned in dollars and cents in Ms. Jahema's account at the end of 4 years?

• $6,400

• $1,400

• $400

• $6,000

Sonja's parent helps her pay for a programming class that costs $2,000. The parent funds 75% of the cost and Sonja will pay the rest. She has one year to save enough money to pay for the class. What is the minimum amount Sonja must save each month to pay for her portion of the class at the end of one year if she saves the same amount each month?

• $166.67

• $125.00

• $41.67

• $16.67

Students in a science class investigated how the speed of sound changes with the air temperature outside. The data are shown in the scatterplot.

Based on the scatterplot what is the best prediction of the speed of sound when the air temperature is 100°C?

• 375 m/s

• 360 m/s

• 350 m/s

• 335 m/s

Which scatterplot does NOT suggest a linear relationship between x and y?

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A team is designing an inflatable spherical model. The model's radius is 18 centimeters.

Which measurement best represents the volume of the spherical model, in cubic centimeters?

Determine the volume of cylinder A in the table.

• 7.07 cubic inches

• 14.14 cubic inches

• 18.85 cubic inches

Determine the volume of cylinder B in the table.

• 7.07 cubic inches

• 14.14 cubic inches

• 18.85 cubic inches

Determine the volume of cylinder C in the table.

• 7.07 cubic inches

• 14.14 cubic inches

• 18.85 cubic inches

The dimensions of a rectangular prism are shown in the diagram. What is the total surface area of this rectangular prism in square inches?

• 245 in.^2

• 259 in.^2

• 119 in.^2

• 210 in.^2