To help with his child’s college fund, Jim needs to invest. Assuming an interest rate of 2.26% compounded quarterly, how much would he have to invest to have $79,400 after 13 years?

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Given that abcd is a rhombus, what is the value of x?