Compute the permutations and combinations.

how many two-digit, positive integers can be formed from the digits 1, 3, 5, and 9, if no digit is repeated?

a. 12
b. 16
c. 24

Find the simple interest earned to the nearest cent for each principal,interest rate,and time 735 7% and two and a half years

Which is the graph of the function y=2(4)^x

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.