Laura wants to buy a new car but needs money for the down payment. Her parents agree to lend her money at an annual rate of \( 3^{\circ} \) a, charged as simple interest. They lend her \( \$ 5000 \) for 4 years, 5 he makes no payments except the one at the end of that time. Answer the following questions. If necessary, refer to the list of financial formulas. (a) How much total interest will Laura have to pay? (b) what will the total repayment amount be (including interest)?

Solve \( x^{2}=36 \), where \( x \) is a real number. Simplify your answer as much as possible. If there is more than one solution, separate them with commas. If there is no solution, click on "No solution".

You own 16 CDs that are stored in a box. You have decided to display 6 of them on a shelf. One at a time, you randomly select a CD from the box and place it on the shelf until there are 6 CDs on the shelf. What is the probability that the CDs on the shelf end up in alphabetical order? Write your answer as a simplified fraction. The probability that the 6 CDs on the shelf are in alphabetical order is

Isabella has some dimes and some quarters. She has at most 25 coins worth a minimum of \( \$ 4.45 \) combined. If Isabella has 17 dimes, write a system of inequalties to determine all possible values for the number of quarters (q) and dimes (d) that she could have.

6. Julie gets a pre-paid cell phone. Initially she has a \( \$ 40.00 \) balance on the phone. Each minute of talking costs \( \$ 0.15 \). Let \( x \) stand for the amount of time in minutes that Julie has talked on the phone, and let \( f(x) \) stand for the remaining dollar value of the phone. a. Is \( f(x) \) a linear function or an exponential function? Explain how you know. its Line ar, becouse the rate stays wonstant. b. Find a function formula equation \( f(x)=-0.15+40 \) c. Find the value of \( f(0) \) and explain its meaning in terms of the cell phone.

6. If \( -\frac{2}{5}<3 k-4<\frac{6}{7} \), then which of the fol- lowing is not a possible value for \( -6 k+8 \) ? A) \( -\frac{5}{7} \) B) \( \frac{1}{7} \) C) \( \frac{1}{3} \) D) \( \frac{4}{3} \)