A certain drug leaves the bloodstream at a rate of 22% per hour. If you are given an initial dose of 20 mg, how long until there are 10 mg in your bloodstreams?

An animal shelter spends $5.50 per day to care for each bird and $8.50 per day to care for each cat. Peyton noticed that the shelter spent $308.50 caring for birds and cats on Friday.

Consider the graph of the quadratic function y = - 2 (x + 2) 2 - 1 with no real zeros.

Jenny uses 7 meters of string to take her kite up in the sky 56 feet. How many meters of string will she need to take the kite to a height of 64 feet?

Kerry read 2/3 of her chemistry book containing 420 pages. David read 3/4 of the same. Who read more pages and by how many pages?

Write 14:56 in its simplest form

Work out the circumference of the circle with radius 2.5 cm

Lee buys 5 DVD's for $60. At this rate, how much woukd he bay for 3 DVDs? A:$10. B $30 C:36. D:$58

Show that - 1.808 is a rational number.

Explain in words how to change a fraction to a percent

There are 3 strawberry ice creams, 4 chocolate ice creams, and 7 vanilla ice creams on a tray. barbara selects 2 ice creams at random without replacement. what is the probability that she selects 2 chocolate ice creams?