Answer:
Step-by-step explanation:
The function is modeled after
where a is the initial amount and b is the growth/decay factor. If we start with 5000 bacteria, then a = 5000. The decay factor is determined by the rate at which the bacteria decrease. We know that rate at which the bacteria decrease is 60% because 40% are left alive; therefore, b = .4:
with a horizontal asymptote of y = 0, the first choice.
-0.45x + 0.33 = -0.66
First we use the subtraction property of equality to get the x term by itself.
( -0.33 - 0.66 = -0.99)
-0.45x = -0.99
Now we use the division property of equality to get the x term by itself.
(-0.99 ÷ -0.45 = 2.2 Two negatives equals a positive)
x = 2.2
The answer is 20 because 3 is closer t 1 than 10
Answer:
Step-by-step explanation:
Total number of questions in the test is 80.
To receive a grade of A on the 80 question test, 90% of the questions must be answered correctly. It means that the number if questions that must be answered correctly would be
90/100 × 80 = 0.9 × 80 = 72.
Therefore, the maximum number of questions that can't be missed to still receive an A is 72
15.25 divided by 100= 0.1525 times 15 = 2.2875 then round to $2.29 (2.29 is the tip) 2.29 + 15.25 = $17.54 would be the total cost!