4 years ago

What is the expressions equivalent to 50+30

Mathematics

1 answer:

djyliett [7]4 years ago

5 0

2^4 * 5 should be it.

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Ryan has $470 in his bank account. His bank statement shows two transactions. He wrote a check for $55 and made a deposit as $30

Alchen [17]

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3 years ago

What two ratios are equivalent to 10:18

Whitepunk [10]

10 : 18 2 into 10 is 5, 2 into 18 is 9.

5 : 9.

You can also choose to multiply 10 : 18 by 2.

2*10 : 2*18

20 : 36.

Therefore 5 : 9 and 20 : 36 are two ratios that are equivalent to 10 : 18.

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4 years ago

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Deborah found that six of the 24 students in her class only cell phone what is the ratio of students out on his cellphone to stu

ELEN [110]

I'm not entirely sure what you're asking, but I believe the answer to your question can be solved by dividing both 6 and 24 by 6 which would give you 1/4, making your answer 4. Hope this helps!

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3 years ago

A contaminant is leaking into a lake at a rate of R(t) = 1700e^0.06t gal/h. Enzymes that neutralize the contaminant have been ad

olasank [31]

Answer:

16,460 gallons

Step-by-step explanation:

This is a differential equation problem, we have a constant flow of contaminant into the lake, but also we know that only a fraction of that quantity of contaminant remains because of the enzymes. For that reason, the differential equation of contaminant's flow into the lake would be:

$\frac{dQ}{dt} =1700exp(0.06t)*exp(-0.32t)\\\frac{dQ}{dt} =1700exp(-0.26t)\\$

Then, we have to integrate in order to find the equation for Q(t), as the quantity of contaminant in the lake, in function of time.

$\int\limits^0_t {dQ}=\int\limits^0_t {1700exp(-0.26t)dt}\\Q(t)=\frac{1700}{-0.26} exp(-0.26t)+C \\$

Now, we use the given conditions to replace them in the equation, in order to solve for $C$

$t_{0} =0\\Q_{0}=10,000\\Q_{0}=-6538exp(-0.26*0)+C\\C=10,000+6538=16538$

Then, we reorganize the equation and we replace t for 17 hours, in order to determine the quantity of contaminant at that time:

$Q_{t} =-6538exp(-0.26t)+16538\\Q_{17} =-6538exp(-0.26*17)+16538\\Q_{17} =16460 gallons$

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3 years ago

Need help! if anyone could give a correct answer that would be great thanks! :)

8_murik_8 [283]

Answer:

7245 / 35 = 207 free tax returns

1,242 / 2 = 621 tax returns

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3 years ago

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