the half life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. starting with 165 grams of radioactive isotope how much will be left after 4 half lives.

Use the equation n^2+n=56 to determine which figure has 56 blocks

Order from least to greatest: - 2, 4, 2 3, - 6, 8 3

Which statement is always true for any parallelogram? a. all four angles are right angles b. the diagonals bisect each other c. all four sides are congruent d. the diagonals are congruent

In fahrenheit 451 what literature is allowable

Ethan's Finances Five years ago, Ethan put some money in a savings account. The value of the account in dollars as a function of t, the time in years the money has been in the account, can be found using this function, as long as he makes no

Tamika opened a money market account that has a 4.25% annual interest rate, compounded annually. She deposits $1,750 into the account each year. How much interest will the account earn after 15 years? $9,449.40 $33,949.40 $35,699.40 $71,398.40

Provide reasons for the proof. Given line h is parallel to line k. line j is perpendicular to line h. Prove line j is perpendicular to line k

Rico is making 4 batches of salsa. Each batch needs 2/3 cup of corn. He only has a 1/3 cup measure. How many times must Rico measure 1/3 cup of corn to have enough for all of the salsa?

Find the Surface area 9 cm 4 cm

mr. montes is a plumber. he charges $35 to evaluate the situation plus $42 per hour that he is working on the job. if he were to lower his base fee by$10 and raise his charge per hour by $5,