The radioisotope cobalt-60 is used in cancer therapy. the half-life isotope is 5.27 years. which is equation determines the percent of an initial isotope remaining after t years?

At a party, 25 slices of pizza are ordered for the 9 guests. If the pizza is equally divided among the 9 guests, how many slices of pizza will be left over?

Work out the area of this semicircle. Take a to be 3.142 and give your answer to 2 decimal places. 10 cm Area of a Circle

Each morning Rin rides 1.5 miles to school and then rides home in the afternoon. Later in the evening, she rides to the park and back home. Over the 5 school days, she rides a total of 25 miles.

Akikta bought 25 trees for $15.40 each. Chloe bought 35 trees for $14.30 each. What was the difference between the total amounts that the girls paid for the trees?

Anna makes $100 a week. She spends $70 a week and saves the rest. She is saving to buy a $240 sound system. How long will it take her to save the money? A. 3 weeks B. 4 weeks C. 6 weeks D. 8 weeks

Jordan and Roman travel the same route to work. Jordan leaves for work one morning and drives at a rate, r, of 56 mph. Roman leaves the house soon after, when Jordan has already traveled 2 mi. Roman drives at a rate of 60 mph.

Evaluate. XSS Submit

Least to greatest 3/4, 0.7, 1/2, 0.1

Simplify the polynomial (-8*) + * + (-2)

Evaluate the expression below when y = - 3. 2y + 7 -4y - 10 A. -1 22 B. -13 2 C. 1 2 D. 1