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slavikrds [6]
4 years ago
8

A tetrahedron is a triangular pyramid whose four faces are identical equilateral triangles. The total lateral surface area is 93

square centimeters. Find the surface area of the tetrahedron.
Mathematics
1 answer:
Tpy6a [65]4 years ago
6 0

Answer:

Step-by-step explanation:

The total area is four times a face area and the lateral area is three times a face area.

Let x be the total surface area then

x/93=4/3

x=4(93)/3

x=372/3

x=124 cm^2

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4 0
3 years ago
42/2 +9=???<br><br> what is the answer and how do you find the answer?!
cluponka [151]
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4 0
3 years ago
I 7) Convert the improper fraction to a mixed number fraction. 12/5 =​
Bingel [31]

Answer:

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Step-by-step explanation:

Hope this helps!!!!!!! Have a good day

7 0
3 years ago
Yolanda deposits $300 per month in an account with an APR of 6%, while Zach deposits $3600 at the end
bonufazy [111]

Answer:

Yolanda will have a balance of $34,043.10 in 14 years.

Step-by-step explanation:

This is an Ordinary annuity question where you pick the hint from the equal and recurring monthly payment.

To find the Future value of Yolanda's savings after 14 years, use Future value of annuity formula FVA = \frac{PMT}{r}[1-(1+r)^{-t} ]\\

PMT= recurring payment = $300

r = discount rate; monthly rate in this case = 6% / 12 =0.5% or 0.005 as a decimal.

t = total duration ; 14 *12 = 168 months

Next, plug in the numbers into the FVA formula;

FVA = \frac{300}{0.005} [ 1-(1+0.005)^{-168} ]

FVA = 60,000 * 0.5673849

FVA = 34,043.0969

Therefore, Yolanda will have a balance of $34,043.10 in 14 years

7 0
4 years ago
73. Erin is 25 years younger than her father. The sum<br> of their ages is 75. How old is Erin?
PSYCHO15rus [73]

25 years old

25years old+25 years between=50 Erin's father

25 years old+50 Erin's father=75

7 0
4 years ago
Read 2 more answers
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