T<1,-7> is the ans because the subtraction sign would go back to 7
The interval of growth rate can be seen in the graph below
The answer is (-∞, ln(4)/0.2) = (-∞, 6.9314)
(As x goes to infinity f(x) goes to 15)
I think the solution you are looking for is this :
+3.1 or postitive 3.1 same thing
The total mass was 149.5 grams.
Setting up an equation, we have that the sample size, 39.1, is 5 3/4 (5.75) grams less than 3/10 of the total mass; this gives us
39.1 = 3/10x - 5.75
Adding 5.75 to both sides, we have
44.85 = 3/10x
Multiplying both sides by 10,
448.5 = 3x
Dividing both sides by 3,
149.5 = x