A gear rotates 8 times every 15 seconds. Based on the information, which of the following could NOT be true? a: the gear rotates 48 times in 90 seconds.
b: the gear rotates 32 times in 1 minute.
c: the gear rotates 16 times in 30 seconds.
d: the gear rotates 24 times in 60 seconds

Blank × 10-3 is 2,000 times greater than 1.9 × 10-6. it is also blank times greater than 9.5 × 10-4.

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?