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malfutka [58]
3 years ago
7

A school district has a simple question: If students take their math classes in the morning instead of in the afternoon, will th

eir test scores improve?
In 20 words or fewer, describe what is being measured in this example and what variable is being manipulated or changed.
Mathematics
2 answers:
garri49 [273]3 years ago
8 0

Answer:

Yikes wish I could help

Step-by-step explanation:

Dovator [93]3 years ago
4 0

Answer:The students ability to perform better or worse is being measured.The time diffrence is being manipulated.

Step-by-step explanation:

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Quadratic equations and functions. <br> n^2+2n-15=0
sveta [45]

Answer:

n = -5, 3.

Step-by-step explanation:

n^2 + 2n - 15 = 0

Let's check if we can factor this quadratic:

We need 2 numbers whose product is -15 and whose sum is +2.

There are 2 such numbers and they are +5 and -3, so the factors are:

(n + 5)(n - 3) = 0.

n + 5 = 0 or n - 3 = 0

therefore the zeroes are -5 and 3.

8 0
3 years ago
Read 2 more answers
Please HELP ASAP PLEASE?????!!!!
Akimi4 [234]

Answer:

-1

Step-by-step explanation:

Any number less than -2 (ex -3, -4, -5) are less than -2

3 0
2 years ago
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A typical cup of coffee contains about 100 mg of caffeine and every hour approximately 16% ofthe amount of caffeine inthe body i
Over [174]

Answer:

a) \frac{dC}{dt} = rC

And for this case we can rewrite the model like this:

\frac{dC}{C} = r dt

If we integrate both sides we got:

ln C = rt + k

If we use exponentials for both sides we got:

C = e^{rt} e^k = C_o e^{rt}

For this case C_o = 100 mg and r = -0.16

So then our model would be given by:

C(t) = 100 e^{-0.16 t}

Where t represent the number of hours

b) C(5) = 100 e^{-0.16*5}= 44.9329

Step-by-step explanation:

Part a

For this case we can assume the proportional model given by:

\frac{dC}{dt} = rC

And for this case we can rewrite the model like this:

\frac{dC}{C} = r dt

If we integrate both sides we got:

ln C = rt + k

If we use exponentials for both sides we got:

C = e^{rt} e^k = C_o e^{rt}

For this case C_o = 100 mg and r = -0.16

So then our model would be given by:

C(t) = 100 e^{-0.16 t}

Where t represent the number of hours

Part b

For this case we can replace the value t=5 into the model and we got:

C(5) = 100 e^{-0.16*5}= 44.9329

7 0
3 years ago
Is 1.65 greather than 16.5
Bas_tet [7]

Answer:

No

Step-by-step explanation:

5 0
2 years ago
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Work out the balance for £1500 invested for 2 years at 3.7% per annum
Zigmanuir [339]
I am assuming its compound interest:-

Balance  = 1500(1 + 0.037)^2  =  £1613.05 answer
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