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3 years ago

A cylindrical barrel contains 42 gallons of oil the diameter is 18 inches. determine the radius of a barrel in centimetres

Mathematics

2 answers:

iren2701 [21]3 years ago

8 0

Hope I helped you enjoy your day

lbvjy [14]3 years ago

3 0

Diameter = 2*Radius
18 = 2*radius
Radius =18/2 =9 inches

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A $59 sweater is on sale for $40. what percent decrease is this?

wariber [46]

Answer:

32.2033898 % decrease

Step-by-step explanation:

To find the percent decrease, take the original amount and subtract the new amount

59-40 = 19

Divide by the original amount

19/59 =.322033898

Change to a percent

32.2033898 % decrease

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4 years ago

2 3 • 2 4 is equal to _____.

dmitriy555 [2]

A. seven factors of 2

when multiplying exponents with the same base the exponents add

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3 years ago

(2^n)^1/2=64 find value of n

sashaice [31]

Hello, I can help.

The value of N- 7

Here is how i got the answer.

1: Multiply both sides by 2

2: Simplify 64*2 to 128

3: convert both sides; 2^n =2^7

4:divide 2 on both sides; n=7

Hope this helps.

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3 years ago

What is the value of x if e^3x+6 = 8?

topjm [15]

We can write any number n in the form $e^{\ln(n)}$ , since $e^x$ and $\ln(x)$ are inverse functions, so that

$e^{3x+6} = 8 \iff e^{3x+6} = e^{\ln(8)}$

The bases are the same on both sides, so the exponents must be equal.

$3x + 6 = \ln(8)$

Solve for x :

$3x = \ln(8) - 6$

$x = \boxed{\dfrac{\ln(8) - 6}3}$

5 0

2 years ago

In which direction does the graph of the function shown below open?

sp2606 [1]

Answer:

D. Up

Step-by-step explanation:

When a parabola has the form $y=ax^2+bx+c$ , It is vertical (opens up or down).

Because the variable "x" is squared.

If "a" is positive, then the parabola opens up, but if it is negative, then the parabola opens down.

In this case you have the quadratic function:

$f(x) = 2x^2+5x-4$

Which can be rewritten as:

$y = 2x^2+5x-4$

Therefore, it is vertical, because it has the form: $y=ax^2+bx+c$

You can observe that the value of "a" is:

$a=2$

Then, since "a" is positive, the parabola opens up.

5 0

3 years ago