In order to control an algae bloom in a lake, scientists introduce some treatment products. Once the treatment begins, the area covered by algae `A`, in square yards, is given by the equation `A=240\cdot\left(\frac{1}{3}\right) ^{t}`. Time, `t`, is measured in weeks.

About how many square yards will the algae cover after 2.5 weeks?

Evaluate 3(a + b + c)squared for a = 2, b = 3, and c = 4. a. 54 b. 243 c.729 add solution .

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.

Find the rate of change for the situation.you run 7 miles in one hour and 21 miles in three hours.