Use scientific notation to express the diameter of a human hair that measures 0.0018 centimeters. A) 1.8 X 10-3 B) 1.8 X 10-4 C) 1.8 X 103 D) 1.8 X 104

30% of what number is 21

21 miles out of 30miles

Evaluate the when g = 9, and h = 7

Alan bowls one game, which consists of 10 frames. The number of pins he knocked down in each frame is 5, 6, 7, 5, 7, 9, 2, 4, 8, and 7. Which measure should Alan use if he wants to calculate the average number of pins he knocked over?

It takes Darline 20 minutes to drive to work in light traffic. To come home when there is heavy traffic, it takes her 36 minutes. Her speed in light traffic is 24 miles per hour faster than her speed in heavy traffic.

John made a rectangle pen for his dog using 28 feet of fencing. If the width of the pen is 2 feet more than one-half the length, what is the length and width of the pen? The length of the pen is 6 feet 7 feet 8 feet

Brad is practicing the piano. he spends 1/4 hour practicing scales and 1/3 hour practicing the piece for his recital. which number is a common denomination for 1/4 and1/3

Which expression is equivalent to 4 (7 + 8) ? A) 11+8 B) 11+12 C) 28+12 D) 28+32

A number is multiplied by 3. If 3 is subtracted from the product you get 24. What is the number? A. 6 B. 7 C. 8 D. 9

Solve the System of Equations 8x + 15y = - 117 4x + 9y=-75 Write your answer as an ordered pair: (x, y)