What is the correct representation of the number 0.00000000023 in scientific notation

What is 0.02 as a percent

What expression is equivalent to 486-9+6+3^*2

In a survey of 24 college students, it was found that 15 were taking an English class, 13 were taking a mathclass, and 8 were taking both English and math.

Tomas bought 3 software apps and 2 e-books for a total of $21. The two e-books cost $12. If s represents the cost of each app, the total cost of all 5 items is represented by 3 s + 12 = 21.

Kendra bought a piece of fabric that was 14 feet long. Lisa bought a piece of fabric that was 3 yards long. Kendra wanted to cut her fabric so that it was the same length as Lisa's. How many feet did she need to cut off?

What is polynomial 10x3 + 35x2 - 4x - 14 is factored by grouping.

Danny gets paid $8 per hour. What is the rate of change? A) m=4 B) m = 1/2 C) m=8

Two equivalent expressions the are equal to (9-c) + (9-c) + (9-c) + (9-c) is

If two angles in a triangle add up to138, then what is the size of the third angle

Kay has an 80% probability of making a free throw in basketball and each free-throw is independent. Kay gets to take two free throws and must make both to win the game. What is the probability that Kay's team will win the game?