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Tresset [83]
3 years ago
15

a scientist has 800 bacteria. with the use of antibiotics half of them die every 2 hours. how may are there after 16 hours

Mathematics
2 answers:
Shalnov [3]3 years ago
8 0
This is what i got in the caculator 6400 if not im so so sory
denis23 [38]3 years ago
5 0
After 16 hours , 3200 bacteria 

because in 2 hours kills 400 right so 

in 16 hours 3200 will be killed 
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Erika worked 14 hours last week and 20 hours this week. If she earns $9 per hour, how much did she earn during these two weeks?
ozzi

we know that

Erika earns \$9 per hour

so

By proportion

Find how much she earn during the total hours of two weeks

The total hours of two weeks is equal to

14+20=34\ hours

\frac{9}{1} \frac{\$}{hour} =\frac{x}{34} \frac{\$}{hours} \\ \\x=34*9 \\ \\x=\$306

therefore

<u>the answer is</u>

\$306

4 0
3 years ago
Read 2 more answers
5/8 + 3/5 greater than 1 or less than 1​
Alex73 [517]

Answer:

Step-by-step explanation:

5/8 + 3/5 =

25/40 + 24/40 =

49/40 = 1 9/40

its greater then 1

8 0
3 years ago
The cost of a whole box of chips are $60. I have $48. What percentage of the total cost do I have?
goblinko [34]

Answer:

Percentage of total I have = 80%    

Step-by-step explanation:

Given:

Price of Box = $60

I Have = $48

To Find:

Percentage I have = ?

Solution:

In this question we are just supposed to find out the percentage of the Value we have so

Percentage can be found by the formula

Percentage =\frac{Given Value}{Total}*100%

Now we have the values of all

So putting in the values

Percentage =\frac{48}{60}*100%

                    =\frac{4800}{60}%

                            = 80%

So the Percentage of total cost I have is 80%

Percentage of total = 80%    


4 0
3 years ago
11/28+4/7 = simplest form
MatroZZZ [7]
The answer to this question is 27/28
4 0
3 years ago
Kelly deposited $4,205 in an account for 3.5 years. She earned $662.29 in interest. What interest rate did the bank pay her?
mylen [45]

Answer:

r = 4.5%

Step-by-step explanation:

Formula:

I = Prt

r = I/(Pt)

Given:

I = 662.29

P = 4205

t = 3.5

Work:

r = I/(Pt)

r = 662.29/(4205 * 3.5)

r = 662.29/14717.5

r = 0.045

r = 4.5%

5 0
3 years ago
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