b. The playing life of a Sunshine radio is normally distributed with mean = 600 hours and standard deviation = 100 hours. What is the probability that a radio selected at random will last from 600 to 700 hours?

Find the sum of the first 8 terms of the following sequence. round to the nearest hundredth if necessary.

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?