3 years ago

Please help! I will mark as brainliest IF answer is right. <3

Mathematics

1 answer:

Murrr4er [49]3 years ago

7 0

A: 20n+40250
B: 35n+35000

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A triangular pyramid and its net are shown. Rain uses Calculations below to conclude that the surface area of a triangular pyram

Harman [31]

Answer:

Rain is correct, calculates correctly, 238.5 square inches

Step-by-step explanation:

The given triangular pyramid is shown with the dimensions.

The surface area of the triangular pyramid is given by :

$A=\frac{1}{2}\left(a \times b\right) + 3\left(\frac{1}{2}\times b\times s\right)$

$A=\frac{1}{2}\left(10 \times 8.7\right) + 3\left(\frac{1}{2}\times 10\times 13\right)$

$A=43.5+(3\times 65)$

$A=43.5+195$

$A=238.5 \ \text{inche}^2$

Therefore, the surface area of the triangular pyramid is = 238.5 square inches.

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2 years ago

Find the area of a circle with a radius of 0.4 inches

AleksandrR [38]

Answer:

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Step-by-step explanation:

Using the area formula pi*r^2 we can find the area of the circle, plugging in the numbers gets us pi*(0.4)^2 = 0.16 π

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2 years ago

Lucy drinks 5 cups of coffee. Doctor said to cut down by 75%. How many ounces of coffee is she allowed per day?

UkoKoshka [18]

The answer is Lucy should be allowed to drink 1.25 ounces a day.

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3 years ago

Given f(x) = -12x + 72, find x when f(x) = 24.

yarga [219]

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2 years ago

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An amusement park ride rotates around a fixed axis such that the angular position of a point on the ride follows the equation: θ

pshichka [43]

I found a missing question online. What is the magnitude of the angular displacement of the ride in radians between times t=0 and t= t1?
We can imagine our ride traveling from the starting point A to some point B (at t=1s).
We can find the angle of both points, and when we subtract them we get angular displacement.
 $A: \theta(0)=a\\
B: \theta(1)=a+b(1)^2-c(1)^3=a+b-c$
Our angular displacement is:
 $\Delta\theta=\theta(1)-\theta(0)=a+b-c-a=b-c=0.85-0.035=0.815 rad$

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3 years ago