Answer these in scientific notation with work shown, adding scientific notation.

1.8 x 10^5 + 2.8 x 10^1

9 x 10^-4 + 4 x 10-6

2.5 x 10^2 + 8.4 x 10^2

3.9 x 10^-1 + 1.6 x 10^-2

7 x 10^-2 + 9.57 x 10^-3

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

For each sentence below, find the value of x that makes each sentence true. (515) 5 = 25* x= (813)2 = 4* x=

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample