Answer:A
Step-by-step explanation: you need to add them so 8.5
The answer is 75 . because you have to divide 45 by 3 to get the starter total which was 15 and then multiple 15 by 5 which give you 75 . therefore anna can buy 5 sweatshirts for $75 .
5(n-10)=40 is the equation
5n-50=40 solve for n
5n = 90
n =18
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The exponential equation for the growth is f(x)=57
where x is the number of days and the population on 21st march is 2069983.5 of microbes.
Given:
Days population
0 57
1 95
5 700
10 8525
We have to form exponential equation which shows the growth of microbes.
We know that exponential equation which shows the sum is as under:
f(x)=P
where r is the rate of growth and x is the number of days, months or years depending on how things grows.
In the question when x=0 population is 57.
f(0)=57
P
=57
P=57
When x=1, population is 95.
f(1)=95
P
=95
57
=95
57=95/
----1
when x=5,population is 700.
f(5)=700
P
=700
57
=700
57=700/
-----2
Equating 1&2
95/
=700/

=7.36
=7.36
=
equating both sides
4r=2
r=0.5
put the value of t=21 in the exponential equation
f(21)=57
=57
=57*36315.5
=2069983.5
Hence the population on 21st march is 2069983.5.
Learn more about equation at brainly.com/question/2972832
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Answer:
SA : 84.9cm³
Step-by-step explanation:
Formula : 4×pi×r² as well as 4pi r²
4 x pi x 2.6²=84.94866535
1dp : 84.9