Joey and Katie have invested some of their money in the stock market, which has been fluctuating over time. The projected value of Joey's assets after t years is
t3 + 2t2 – 3t+ 400. Katie's projected assets after t years is t4 – 5t2 + 100.
a) How much money did each of them initially invest?
b) What is their combined wealth after five years?
c) What is their combined wealth after t years?

7.3

step-by-step explanation:

81+30=111180 minus 111=691/2×19=9.569÷9.5=7.263157895~7.3

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.