the radioactive isotope oxygen-22 has a half-life of 2.25 seconds. the time it will take for
a sample of oxygen-22 to decay to 35% of its original amount to the nearest hundredth of a
second, is?
this is for math 12 pre calc

x-3y=4

step-by-step e

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet

my guess is

step-by-step explanation: