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Archy [21]
3 years ago
8

40% of 80 What’s for this Question

Mathematics
2 answers:
Marat540 [252]3 years ago
8 0

Answer:

32

Step-by-step explanation:

40% of 80

0.40*80=32

natta225 [31]3 years ago
3 0

Answer:32

Step-by-step explanation:

80x.40=32

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What is the volume of a rectangular prism whose dimensions are 2 feet, 2.5 feet and 4 feet?
Romashka [77]

Answer:A

Step-by-step explanation: you need to add them so 8.5

8 0
3 years ago
Anna can buy 3 sweatshirts for a total of $45.00. How much would it cost if she were to buy 5 sweatshirts at the same price. a.$
professor190 [17]
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 .
7 0
3 years ago
5 times the difference of a number subtracted from 10 is 40. What is the number?
postnew [5]
5(n-10)=40  is the equation 
5n-50=40 solve for n
5n = 90
n =18

hope this helps . give me brainliest id appreciate it !
8 0
4 years ago
Sherrie's biology class is studying the ability of a certain microbe to dissipate oil spilled in seawater. to be effective the p
choli [55]

The exponential equation for the growth is f(x)=57e^{0.51x} 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)=Pe^{rt} 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

Pe^{0}=57

P=57

When x=1, population is 95.

f(1)=95

Pe^{r}=95

57 e^{r}=95

57=95/e^{r}----1

when x=5,population is 700.

f(5)=700

Pe^{5r}=700

57e^{5r}=700

57=700/e^{5r}-----2

Equating 1&2

95/e^{r}=700/e^{5r}

e^{5x} /e^{x} =700/95

e^{5r-r}=7.36

e^{4r}=7.36

(2.7182)^{4r}=(2.7182)^{2}

equating both sides

4r=2

r=0.5

put the value of t=21 in the exponential equation

f(21)=57e^{0.5*21}

=57e^{10.5}

=57*36315.5

=2069983.5

Hence the population on 21st march is 2069983.5.

Learn more about equation at brainly.com/question/2972832

#SPJ4

8 0
2 years ago
Work out the surface area of this sphere give your answer to 1 decimal place it is 2.6cm
hram777 [196]

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

5 0
3 years ago
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