Answer:
39
Step-by-step explanation:
because the decimal is moved 39 times as shown by calculating the sum
Answer:
$306 go to the school
Step-by-step explanation:
2.15*600 = 1290
0.45*600 = 270
subtract :
1290- 270 = 1020
$1020 made
1020* 30% = 1020 * 0.30
1020* 0.30 = 306
so
$306
x+2 because it just doubles hon so the pattern can actually tell you the expression.
So for example,
if x=2 then 2+2 is 4
if x=4 then 4+4 is 8
and so on and so forth.
I really hope that this makes sense and helped you out in a way hon:)
Answer:
174 ft^2
Step-by-step explanation:
Answer:
It'll take approximately 9.1 minutes
Step-by-step explanation:
The decay of this element can be modeled by the following expression:
m(t) = 540*(1 - 0.179)^t
Where m is the mass of the element in a given minute t. This expression comes from a compounded interest formula, with negative rate, since they will work in the same manner. Therefore to find how long until it reaches 90 g, we need to make m = 90 and solve for t.
90 = 540*(0.821)^t
(0.821)^t = 90 / 540
(0.821)^t = 1/6
ln(0.821^t) = ln(1/6)
t*ln(0.821) = ln(1) - ln(6)
t*ln(0.821) = - ln(6)
t = -ln(6)/ln(0.821) = 9.08452
It'll take approximately 9.1 minutes
