You can answer any 18 questions from a total of 20 questions on an exam. In how many different ways can you select the questions?

Find the sum of the finite arithmetic sequence. Sum of the integers from −10 to 50

Find the sum of the infinite geometric series, if possible. If not possible, explain why. $\sum_{k=1}^{\infty} 1.3\left(\frac{1}{10}\right)^{k-1}$

A professor provides to a class 25 possible essay questions for an upcoming test. Of the 25 questions, the professor will ask 5 of the questions on the exam. How many different tests can the professor prepare?

Find the sum. Use a graphing utility to verify your result. $\sum_{n=0}^{6} 500(1.04)^{n}$

How do you calculate the present value of a cash flow stream?

Find the coefficient a of the given term in the expansion of the binomial. Binomial $(x+4)^{12}$ Term $a x^{4}$

A firm has a net income of $220,000 in 2021. A forty-eight percent tax rate and interest expense of$50,000 in 2019, given these numbers, calculate the following:

A. Its earnings before interest and taxes.

B. It times the interest earned ratio for 2019.

Write the first five terms of the sequence (a) using the table feature of a graphing utility and (b) algebraically. (Assume n begins with 0.) $a_{n}=\frac{1}{(n+1) !}$

Use the Binomial Theorem to expand the complex number. Simplify your result. ( Remember that $=\sqrt{-1}$.) $\left(-\frac{1}{3}+\frac{\sqrt{3}}{3} i\right)^{3}$

Find the sum of the finite arithmetic sequence. Sum of the integers from −100 to 30

write the first five terms of the sequence (a) using the table feature of a graphing utility and (b) algebraically. (Assume n begins with 0.) $a_{n}=\frac{1}{n !}$

Find the sum. Use a graphing utility to verify your result. $\sum_{n=0}^{5} 300(1.06)^{n}$

Find the coefficient a of the given term in the expansion of the binomial. Binomial $(x+3)^{12}$ Term $a x^{5}$