Unit 2 Test Review

Arrange the four numbers written in scientific notation in descending order.

5.3 X 10^-1, 3.4 X 10^-7, 2.9 X 10^-4, 1.9 X 10^-8

• 2.9 X 10^-4, 1.9 X 10^-8, 5.3 X 10^-1 , 3.4 X 10^-7

• 3.4×10^-7, 5.3 ×10¯¹,

  1.9 ×10^-8, 2.9 ×10¯⁴

• 2.9x10^-4, 1.9 ×10^-8,

  3.4×10^-7, 5.3 ×10¯¹

• 5.3×10¯¹,2.9 ×10^-4,

  3. 4 ×10^¯7, 1.9 ×10^-8

Kristen had -$35 in her checking account. She did a few chores and made $99.50. She decided to pay for her and a friend to go to the movies, and each ticket cost $8.25. How much money does she have left in her checking account?

There are 50 students in Mrs. Stacy's class, and 1/2 of the class has their own cell phone. Of this group of students, 1/5 of them are allowed to use social media. How many of the students have a cellphone and can use social media?

• 25 students

• 13 students

• 10 students

• 5 students

6xy - 10

when x = 3 and y = 9

• 38

• 42

• 50

• 24

7) √o + gd When o = 36, g = -5, and d = -9

• 49

• 51

• 45

• 55

8. Leanny started her hike at an elevation of 250 feet below sea level. Throughout the hike she ascended 4,156 feet and then descended 500 feet. How much did her elevation change? (Show your work)

9. Damon rents a kayak at a nearby state park. He pays a flat rate of $15.00 plus $2.75 for each hour that he spends in the water. How much did Damon spend if he was on the river for 4.5 hours? (Show your work)