How many unique ways are there to arrange the letters in the word DEN?

D d x ∫ 0 x 1 + a 3 d a

Suppose a quarter of all the elephants in an African wildlife refuge have ear tags. If there are exactly 60 tagged elephants, what is the total number of elephants in refuge.?.

The price of silver went from $26.40 a troy ounce down to $17.16 a troy ounce during the past 6 months. This represents a decrease in price of what percent?

If the range of the function f (x) = x4 is {28, 30, 32, 34, 36}, what is its domain?

Adele bought a skirt and a blouse. The skirt cost $2 more than the blouse. Let b represent the cost of the blouse. Write an expression for the cost of the skirt

If you are 29 years old, you have been alive for about 920,000,000 seconds. write this number in scientific notation.

What is 10/6as a improper fraction

Henry is considering purchasing a mountain bike he likes to brakes cost $500 and the other cost $600 he tells his dad that the bike that is where expensive is 20% more than the cost of the other bike is he correct

Molly is making a sign in the shape of a trapezoid. One base is 18 inches and the other is 30 inches. How high must she make the sign so its area is 504 square inches?

While hiking, Sanjay went up 200 meters. If Sanjay started at 500 meters above sea level, which integers represents his elevation now?