You spin a spinner 40 times what is the probability of spinning a 3 or 4

How many zeros does the function f(x)=4x3-x2+1 have

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Abcd is a square. what is the measure of angle bac