Four prime numbers are written in ascending order. The difference of the product of first two and the product of last two is −108. What is the first number?

Emma needs to order liquid fertilizer for her landscaping company. She plans to keep the fertilizer in a large cylindrical storage tank, but isn’t sure how much it will hold. The tank is 10 feet tall and the circular base has a radius of 5 feet. What is the volume of her storage tank?

To find the height of a building, Oscar stuck the end of a \(4 \frac {1}{2}\) -foot stick 6 inches straight into the ground. He measured the shadow of the stick and found it was 1 foot long. Oscar then measured the building's shadow and found it was 16 feet long.
How many feet tall is the building?

A sum of money is increased by its fifth part and it amounts to \(\$ 30\) . What was the original sum?

Peggy sleeps \(7 \frac{1}{2}\) hours at night. Her clock radio is set for 6:15 A.M. At what time does she fall asleep?

Evaluate \(\frac{\sqrt{121 \div 11}}{33 \times 15}\)

What will be the value of p in the equation \(\sqrt{p^{2}-25}=12\)?

What are the factors of \(\frac{a^{3}}{1000}+1\) ?

Simplify:\(a(3+5 a)-4\left(a^{2}+5\right)\)