1. which of the following is a goal of the u. s. space shuttle program? a. get astronauts to permanent space stations b. deliver satellites for exploratory research c. both a and b 2. the international space station is designed to let astronauts stay for about
a. 6 months
b. 1 year
c. several years

Me ! evelyn is a manager in a retail unit. she wants to prepare a report on the projected profit for the next year. which function can she use? a. pmt b. round c. division d. what-if analysis

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For positive constants a and b, the force between two atoms in a molecule is given f(r) = −a r2 + b r3 , where r > 0 is the distance between the atoms. note: a and b are upper case letters. (a) find f '(r) = (b) find the critical point for f(r). r = (c) find f ''(r) = (d) find the value of r so that f ''(r) = 0.