For this case we have the following equation:
u (t) = 12 • 2 ^ t / 3
We equate the equation for u (t) = 50.
We have then:
12 • 2 ^ t / 3 = 50
We clear the value of t:
2 ^ t / 3 = 50/12
log2 (2 ^ t / 3) = log2 (50/12)
t / 3 = log2 (50/12)
t = 3 * log2 (50/12)
t = 6.2 years
Answer:
After 6.2 years 50 acres of wetland are infested by an invasive plant species
Answer:
4cm x 5cm x 3cm = 60cm
Step-by-step explanation:
You have to multiply each number by the next, then you have the area, to find the PERIMETER, you multiply each number by the amount of sides it is on and add
(15(.17)+.29x)/(15+x)=.23
2.55+.29x=3.45+.23x
.06x=.9
x=15
So 15L of the 29% solution was added to the 15L of 17% solution to make
30L of 23% solution.
You should first change the denominator into same number, which is 18
So you multiply the first fraction of both numerator and denominator by 3, and the second by 2:
3(g-2) / 18 - 2(g+3) / 18 = (3g - 6 - 2g - 6) / 18 = (g-12)/18
83 divided by 9 equals 9.2222
9 multiplied by 9 equals 81
83 subtract 81 equals 2
there will be 2 left over
