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3 years ago

What is the total surface area of the square pyramid?

Mathematics

1 answer:

harkovskaia [24]3 years ago

5 0

Answer:

Step-by-step explanation:

$A_1 = a^2 = 14^2 = 196$

$A_2 = 4(\frac{b * h}{2}) = 4(\frac{14 * 12}{2}) = 4(\frac{168}{2}) = 4 * 84 = 336$

$SA = A_1 + A_2 = 196 + 336 = 532\ cm^2$

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18 is what percent of 60?

anastassius [24]

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3 years ago

What % is 4485.00 of 28386.00 ?

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Read 2 more answers

How did the temperature change if: at first it decreased by 60% and then increased by 80%. PLEASE NEED HELP!

Sergio039 [100]

The temperature decreased by 28%

Step-by-step explanation:

How did the temperature change if :

At first it decreased by 60%
Then increased by 80%

Assume that the temperature before decreasing is 100%

∵ The temperature before decreasing = 100%

∵ It decreased by 60%

→ Before decreasing : decreasing : after decreasing

→ 100% : 60% : 100% - 60% = 40%

∴ The temperature after decreasing = 40%

Assume that the temperature after decreasing is 100%

∵ The temperature after decreasing = 100%

∵ It increased by 80%

By using the ratio method

→ After decreasing : increasing : after increasing

→ 100% : 80% : 100% + 80% = 180%

→ 40% : : x%

By using cross multiplication

∴ 100% × x% = 40% × 180%

- Divide both sides by 100%

∴ x% = $\frac{(40)(180)}{100}$

∴ x% = 72%

∵ At first the temperature = 100%

∵ At last the temperature = 72%

∵ The first the temperature > the last the temperature

∴ The decreasing in temperature = 100% - 72% = 28%

The temperature decreased by 28%

Learn more:

You can learn more about ratio in brainly.com/question/2707032

#LearnwithBrainly

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3 years ago

James buys a shirt that is $22.95. He buys 3 pairs jeans. His total is $117.45. How much is each pair of jeans?

docker41 [41]

Ok so 117.45 is total then u subtract 117.45 by 22.95 equals 94.5 and u divide by 3 so u get 31.5 and add the unit rate so the answer is $31.50

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3 years ago

[50 pts] An even number, n, times the next consecutive number, n + 2, is equal to 168. Find the original number.

ale4655 [162]

We are given:

An even number 'n', multiplied by the next consecutive even number is 168

Solving for n:

From the given statement, we can say that:

n(n+2) = 168 [n multiplied by the next even number 'n+2']

n² + 2n = 168

n² + 2n - 168 = 0 [subtracting 168 from both sides]

We can see that we now have a quadratic equation, solving using splitting the middle term

n² + 14n - 12n - 168 = 0

n(n + 14) -12(n + 14) = 0 [factoring out common terms]

(n-12)(n+14) = 0

Here, we can divide both sides by either (n-12) OR (n+14)

Checking the result in both the cases:

(n + 14) = 0/(n-12) (n-12) = 0/(n+14)

n + 14 = 0 n - 12 = 0

n = -14 n = 12

Both these values are even and since we are not told if the number 'n' is positive or negative, both 12 and -14 are the possible values of n

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3 years ago

What is the total surface area of the square pyramid? ​

What is the total surface area of the square pyramid?