Mathematics, 27.05.2021 02:20 isabeljackson562

Find the area of a circle with a diameter of 22 millimeters. Round to the nearest tenth.
A 380.1 mm2
B 319.5 mm2
C 189.9 mm2
D 69.1 mm?

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Answer from: mrashrafkotkaat

A. 380.1 mm²

General Formulas and Concepts:

Symbols

π (pi) ≈ 3.14

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Geometry

Area of a Circle Formula: A = πr²

r is radius

Radius Formula: $\displaystyle r = \frac{d}{2}$

d is diameter

Step-by-step explanation:

Step 1: Define

Identify variables

d = 22 mm

Step 2: Derive

Rewrite formula

[Area of a Circle Formula] Substitute in r [Radius Formula]: $\displaystyle A = \pi (\frac{d}{2})^2$ Evaluate exponents: $\displaystyle A = \pi (\frac{d^2}{4})$ Multiply: $\displaystyle A = \frac{\pi d^2}{4}$

Step 3: Solve for A

Substitute in variables [Modified Area of a Circle Formula]: $\displaystyle A = \frac{3.14(22 \ mm)^2}{4}$ Evaluate exponents: $\displaystyle A = \frac{3.14(484 \ mm^2)}{4}$ Multiply: $\displaystyle A = \frac{1520.53 \ mm^2}{4}$ Divide: $\displaystyle A = 380.133 \ mm^2$ Round: $\displaystyle A \approx 380.1 \ mm^2$

Answer from: Quest

the answer is c)8

step-by-step explanaction:

Answer from: Quest

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length

Brainliest and 75 points for whoever can explain how to get these given: △acm, m∠c=90°, cp⊥ am. ap=

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Find the area of a circle with a diameter of 22 millimeters. Round to the nearest tenth.
A 38...