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3 years ago

(Geometry) PLZ HELP ASAP

Mathematics

1 answer:

katen-ka-za [31]3 years ago

8 0

Answer:66.4

Step-by-step explanation:

$A_{semicircle} =\frac{1}{2} \pi r^2=\frac{1}{2} \pi (\frac{13}{2} )^2= 66.36614 \approx66.4$

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F(x)=-5x^2+2x-1. Find: f(-a)

lyudmila [28]

Answer:

$f(x) = 5 {x}^{2} + 2x - 1 \\ f( - a) = 5 {( - a)}^{2} + 2 \times - a - 1 \\ = 5 {a}^{2} - 2a - 1 \\ thank \: you$

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3 years ago

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What is the surface area of the tepee

Snowcat [4.5K]

The surface area of the teepee is 399.12 square feet

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4 years ago

Marimar buys and old mirrors for $45:00 . She spend $5:00 to fix and paint it . Then she sell the mirror for $78:00 . What is ma

jolli1 [7]

Answer:

28 dollars

Step-by-step explanation:

$45+$5= $50 which is how much she spent it total

then she sells it for $78

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3 years ago

Which of the following options have the same value as 30\%30%30, percent of 818181?

Nataly_w [17]

Answer:

Option B is correct = $0.3 \times 81$

Step-by-step explanation:

The complete question is: Which of the following options have the same value as 30% of 81?

Group of choices is:

(A) $\frac{30}{100}\times 81 \times 100$

(B) $0.3 \times 81$

(D) $\frac{3}{10}\times 81 \times 10$

(E) $30 \times 81$

Now, the expression given to us is 30% of 81.

Simplifying the above expression we get;

30% of 81 = $\frac{30}{100} \times 81$

= $\frac{3}{10} \times 81$ = $0.3 \times 81$

Now, we will solve each of the given options and then see which option matches with our calculation.

Option (A) is given;

$\frac{30}{100}\times 81 \times 100$ = $30 \times 81$

This doesn't match with our answer, so this option is not correct.

Option (B) is given;

$0.3 \times 81$

This matches with our answer, so this option is correct.

Option (C) is given;

$0.03 \times 81$

This doesn't match with our answer, so this option is not correct.

Option (D) is given;

$\frac{3}{10}\times 81 \times 10$ = $3 \times 81$

This doesn't match with our answer, so this option is not correct.

Option (E) is given;

$30 \times 81$

This doesn't match with our answer, so this option is not correct.

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4 years ago

ammy is taking notes to study for a test. He wrote out the steps that involve hydrogen during photosynthesis. The steps are show

kolezko [41]

Answer:

4 - 1 - 3 - 2

Step-by-step explanation:

4 - Hydrogen enters the plant as part of water.

1 - Water is broken down into oxygen and hydrogen.

3 - Hydrogen combines with carbon dioxide to form glucose.

2 - Glucose is broken down to be used by plants.

During the process of photosynthesis, water and carbondioxide combined in the presence of sunlight to give rise to glucose which is then broken down to be used by plants. This is the process by which plants manufacture their food. Water is made up of hydrogen and oxygen. The hydrogen combines with CO2 to produce sugar for the plants.

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