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Makovka662 [10]

3 years ago

9

for 9x + 25= 88, Deena wrote the situation “ i bought some shirts at the store for $9 each and received a $25 discount. My total

bill was $88. How many shirts did i buy.what mistake did deena make

1 answer:

drek231 [11]3 years ago

4 0

Well a discount would mean that you would take away $25, but the equation says "+ 25" so you could not describe it as a discount. I hope this helps!

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In a lab, a scientist is growing bacteria for a study. The scientist begins with a bacteria

Diano4ka-milaya [45]

Answer:

The answer is below

Step-by-step explanation:

The growth of the bacteria is in the form of an exponential growth. It is given by the formula:

$P(t)=ae^{rt}\\\\where\ t\ is\ the\ number\ of \ hours, P(t)\ is\ the \ population\ at\ t\ hours\\\and\ a=population\ at\ start$

At 2 hours, the population is 62 cells, hence:

$P(2)=ae^{2r}\\\\62=ae^{2r}\ \ .\ \ .\ \ .\ (1)$

After another 2 hours (4 hours), the population is 1 million:

$P(4)=ae^{4r}\\\\1000000=ae^{4r}\ \ .\ \ .\ \ .\ (2)\\\\Divide \ equation\ 2\ by\ equation\ 1:\\\\\frac{1000000}{62}=\frac{ae^{4r}}{ae^{2r}} \\\\16129=e^{2r}\\\\ln(e^{2r})=ln(16129)\\\\2r=9.688\\\\r=4.844$

Put r = 4.844 in equation 1

$62=ae^{2*4.844}\\\\62=16129a\\\\a=0.003844$

$P(t)=0.003844e^{4.844t}\\\\at \ start,t=0\\\\P(0)=0.003844$

4 0

3 years ago

Please help me it is very much appreciated

pshichka [43]

<h2>C</h2>

Hope it helps you!

-miraculousfanx-

7 0

3 years ago

What its two plus two

anastassius [24]

4 what do you think it is 1000000000

7 0

4 years ago

Read 2 more answers

Marisol bought 2 7/8 pounds of bananas, a 3 1/2 pound bag of apples, and 2 bags of oranges that each weighed 2 3/4 pounds. How m

attashe74 [19]

Answer:

9 3/4

Step-by-step explanation:

Pounds of bananas=2 7/8

=23/8

Pounds of apple=3 1/2

=7/2

2 bags of oranges=2 3/4 each

11/4 each.

Total pounds of oranges=2(11/4)

=22/4

Total pounds of fruits Marisol bought from the market=pounds of bananas+pounds of apples+pounds of oranges

=28/8+7/2+22/8

Find the L.C.M and add them

The L.C.M=8

Total pounds of fruits =28+28+22/8

=78/8

=9 6/8

Equivalent to

9 3/4

3 0

4 years ago

Which ratio is equal to 1 1/3 :2

arsen [322]

You can solve this by convert mixed number(s) into improper fraction(s) 2. change both fractions to the equivalent fractions with the same denominator 3. omit denominators and write numerators as a ratio 4. simplify the ratio by dividing both numbers by the highest common factor.

8 0

3 years ago