Lesson 6 I Ready quiz review

A submarine descends 234.5 feet in 50 seconds. Write an expression that can be used to find the average change in elevation of the submarine, in feet per second.

•  $-50\ \div\ 234.5$  

•  $-234.5\ \times\ 50$  

•  $-234.5\ \div\ 50$  

•  $-50\ \times\ -234.5$  

A submarine descends 234.5 feet in 50 seconds. The submarine's elevation change is at a constant rate. What is the elevation change of the submarine after 10 seconds.

• 46.9

• -46.9

• -4.69

• -23.45

The following shows the shore decrease in the last 4 months.

Month 1 -1.50

Month 2 -0.25

Month 3 -0.75

Month 4 -2.75

Which statements are true? Choose all that apply.

• Month 1 is 6 times as much as Month 2

• Month 2 is 3 times as much as Month 3

• Month 4 is 3 times as much as Month 3

• Month 3 is 3 times as much as Month 2

If a < 0 , What must be true about b so that ab < a

• b ≥-2

• b = 0

• b < -1

• b > 1

A submarine in traveling at -3¾ meters in one minute. What is the change after 8 minutes

• -120

• -30

• 15

• -9

a plane is descending at a rate of 8⅓ meter per minute. How long will it take for the plane to descend 100 meters.

• 8 minutes

• 15 minutes

• 12 minutes

• 12 meters

-2.5( -3.25)

• -81.25

• -8.125

• 81.25

• 812.5

 $\frac{4}{5}\ \times\ \left(-2\frac{2}{3}\right)$  

•  $-2\frac{2}{15}$  

•  $-3\ \frac{1}{15}$  

•  $-\frac{3}{10}$  

•  $-2\ \frac{8}{15}$  

 $\frac{2.5}{0.8}$  

• 0.312

• 3.13

• 0.03125

• 3.125

 $-2\frac{2}{5}\ \div\ \frac{3}{15}$  

•  $-2\ \frac{1}{2}$  

•  $-12$  

•  $-4\$  

• 12