There are 9 grams of Strontium-90. Strontium-90 has a half-life of 28.8 years. Use the formula A = P * (1/2) ^ (t/h) to calculate the time it would take for the given mass to degrade down to 0.41 grams. Calculate the solution for t to the nearest tenth using logarithms .

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

answer: i don't understand it

step-by-step explanation: sorry

step-by-step explanation:

what are the statements? and what do you mean by "216 2 1 6"?

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116