Crew a can tunnel through a mountain in 30 days. if crew B starts from the other side at the same time, the tunnel can be completed in 18 days. how long would it take crew B working alone?

What is 3 ln - 9 expressed as a single natural logarithm? A. Ln 3 B. Ln 6 C. Ln 18 D. Ln 27

The outside dimensions of a rectangular cooler without its top are26 inches by 14 inches by 16 inches. The cooler is 2 inches thick. What is the volume inside the cooler?

Which is easier to use - the outer semi-circle or the inner semi-circle?

Jenny is four times as old as her niece Tina in 12 years jenny will be only twice as old as Tina

The exterior surface of a cylinder with a circumference of 2 feet and a length of 5 feet (and no end caps) is the same as the area of

The Science Club has 35 members, 10 girls and 25 boys. What is the ratio of girls to boys in the Science Club? A. 2:1 B. 2:5 C. 5:2

The cost of petrol rises by 2 cents a liter. last week a man bought 20 liters at the old price. This week he bought 10 liters at the new price. Altogether, the petrol costs $9.20. What was the old price for 1 liter?

1. Which equation represents the linear graph? A) y = 2x - 4 B) y = 2x + 4 C) y = 4x - 2 D) y = 4x + 2

Mary has $500 in her account. She makes a $350 withdrawal, deposits $100, and then gets charged a $20 fee. How much does she have in her account? A) $180 B) $230 C) $290 D) $340

A function g (x) has x-intercepts at (1/2,0) and (6,0). Which could be g (x) ? g (x) = 2 (x + 1) (x + 6) g (x) = (x-6) (2x - 1) g (x) = 2 (x - 2) (x-6) g (x) = (x + 6) (x + 2)