A 90 g sample of plutonium-238 has a half-life of 88 years. How long will it take for this sample to decay to

40 g?

Multiply to determine how many cubic feet of mulch lexi will need

Convert the following fraction to a decimal 5/9

Find a power series for f (x) = xln (1+x). / [f (x) = xln (1+x) / ]. / [/frac{d}{dx}xln (1+x) / ]. / [=/frac{x}{x+1}+ln (x+1) / ]. / [=/sum_{n=0}^{/infty} (-1) ^nx^n+/frac{d}{dx}ln (x+1) / ].

Jessica earned at least $140 working at the library for 11 hours last week. Which of the following inequalities models this situation? A. p < 11 B. C. 11p 140 D. 11p 140 mathematical sentences

14) For the situation below determine the independent value, the dependent value, and the constant of proportionality for both ratios. Confirm your calculations by setting up a proportion with the two ratios and then cross-multiplying.

1. In what country did the government debate the merit of teaching students quadratics? 2. What modern technology would not be possible without quadratics? (hint: I have one at my house.) 3. What great ideas did the Babylonians come up with? 4.

Which equation forms a pair of linear equations with 9x+12y=48 such that the system has no soulution?

What is the percent of decrease from 155,000 to 140,00

A telephone company charges $0.30 for the first 4 minutes of a call and $0.18 for each additional minute. How long can a person talk for $3

determine if these equations are true or false A. 50 tens x 4 hundreds = 40 tens x 5 hundreds B. 24 x 10 x 90 = 90 x 2400