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2 years ago

Jake paid $13.50 for admission to the county fair

Mathematics

1 answer:

katrin [286]2 years ago

3 0

Answer:

uhhhhhh what else tho

Step-by-step explanation:

You might be interested in

Is 3,540 reasonable for the difference 9,760-5,220

Ugo [173]

Answer:

no it's 4540

Step-by-step explanation:

you just subtract 5220 from 9760 and you get your difference

3 0

3 years ago

3.18x+2.6+0.9x+x=28<br> Solve please, brainliest will be awarded

Elis [28]

Answer:

x=5

Step-by-step explanation

3.18x+2.6+0.9x+x=28

3.18x+0.9x+x+2.6=28

5.08x+2.6=28

5.08x+2.6-2.6=28-2.6

5.08x=25.4

x=5

hope it helps

8 0

3 years ago

Read 2 more answers

Suppose after 2500 years an initial amount of 1000 grams of a radioactive substance has decayed to 75 grams. What is the half-li

krok68 [10]

Answer:

The correct answer is:

Between 600 and 700 years (B)

Step-by-step explanation:

At a constant decay rate, the half-life of a radioactive substance is the time taken for the substance to decay to half of its original mass. The formula for radioactive exponential decay is given by:

$A(t) = A_0 e^{(kt)}\\where:\\A(t) = Amount\ left\ at\ time\ (t) = 75\ grams\\A_0 = initial\ amount = 1000\ grams\\k = decay\ constant\\t = time\ of\ decay = 2500\ years$

First, let us calculate the decay constant (k)

$75 = 1000 e^{(k2500)}\\dividing\ both\ sides\ by\ 1000\\0.075 = e^{(2500k)}\\taking\ natural\ logarithm\ of\ both\ sides\\In 0.075 = In (e^{2500k})\\In 0.075 = 2500k\\k = \frac{In0.075}{2500}\\ k = \frac{-2.5903}{2500} \\k = - 0.001036$

Next, let us calculate the half-life as follows:

$\frac{1}{2} A_0 = A_0 e^{(-0.001036t)}\\Dividing\ both\ sides\ by\ A_0\\ \frac{1}{2} = e^{-0.001036t}\\taking\ natural\ logarithm\ of\ both\ sides\\In(0.5) = In (e^{-0.001036t})\\-0.6931 = -0.001036t\\t = \frac{-0.6931}{-0.001036} \\t = 669.02 years\\\therefore t\frac{1}{2} \approx 669\ years$

Therefore the half-life is between 600 and 700 years

5 0

2 years ago

A.645,473<br> B.2,151,575<br> C.8,175,987<br> D.10,542,719

ELEN [110]

21515754 people total* 0.38= 8175986.52 people

Final answer: C

3 0

3 years ago

A linear relationship has the point (4, 48) and its rate of change is 12.

Triss [41]

Answer:

Step-by-step explanation:

Y-48=12(x-4)

Y= 12x

So the y intercept is 0

5 0

2 years ago