You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account

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?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

If the scale factor between two circles is 2x/5y what is the ratio of their areas?