Solve application problems by multiplying integers

Scientists lowered a submersible into the Pacific Ocean to record water temperature. The first measurement was made 75 feet below sea level, and more were made every 75 feet after that.

Find the depth of the submersible when the 25th measurement was made. Use a signed number.

Inspectors took soil samples to check a leaking gasoline tank. The first sample was taken 6 feet below ground level, and more were taken every 6 feet after that.

The 14th sample was the first one that showed no signs of gasoline. How far below ground level was that? Use a signed number.

As part of a training exercise, a submarine captain ordered the vessel to descend 250 feet, level off for 5 minutes, then repeat.

If the sub started at the ocean's surface, find its depth after the 8th dive. Use a signed number.

A pile driver pounds poles into the ocean floor. Each strike sends a pole 6 inches deeper.

Find the depth of the pole after 20 strikes. Express your answer as a signed number in inches.

Russia's population is decreasing by about 700,000 people per year due to high death rates and low birth rates.

If this pattern continues, what will be the total decline over the next 30 years? Use a signed number.

A farmer is told that temperatures will decrease approximately 5 degrees every hour for the next 5 hours.

What signed number represents the total change in temperature expected over the next five hours?

For each of the last 6 years, a businesswoman has filed a \$200 depreciation allowance on her tax return for an office computer system.

What signed number represents the total depreciation written off over the six-year period?

A levee's banks are eroding at a rate of 2 feet per year.

What signed number indicates how much of the levee will erode during the next decade?

A physician offers two diet plans:

Select all correct signed numbers below.