Krystal balls pulse rate is 30% higher than its usual rate of 70bmp. What is her pulse rate? After lying down it deceased 20%. What is her heart rate now?

What is the square root of 45? (step by step working plz)

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.