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3 years ago

The radius of a semicircle is 3 centimeters. What is the semicircle's area?

Mathematics

1 answer:

topjm [15]3 years ago

6 0

Answer:

$A = \frac{9}{2} \pi\ cm^{2}$

Step-by-step explanation:

Area of a full circle is $r^{2} \pi$ .

Area of a semicircle is exactly half of it: $\frac{1}{2} r^{2} \pi$ .

$A = \frac{1}{2} 3^{2} \pi = \frac{9}{2} \pi = 14.137\ cm^{2}$

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The price of the product decreased by 10%and then decreased by 20% . calculate total percentage change between the final and ini

aev [14]

What is percentage change?

By quantifying the difference between two numbers and expressing it as an increase or decrease, the Percentage Change Calculator (percent change calculator) may determine the percentage change.

The initial price $V_{1}$ (100%) was decreased by 10%., then this reduced price is reduced more by 20% that becomes the final price $V_{2}$ which is 72.

Calculate percentage change from $V_{1}=100$ to $V_{2}=72$ .

= $& \frac{\left(V_{2}-V_{1}\right)}{\left|V_{1}\right|} \times 100 \\$

$=& \frac{(72-100)}{|100|} \times 100 \\$

$=& \frac{-28}{100} \times 100 \\$

$=&-0.28 \times 100 \\$

$=&-28 \% \text { change } \\$

$=& 28 \% \text { decrease }$

To know more about percentage change visit:

brainly.com/question/7568722

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7 0

1 year ago

X – 1 + 2x ≤ x + 3 --- --- 2 4

Paraphin [41]

X – 1 + 2x ≤ x + 3
--- ---
2 4=7658

5 0

3 years ago

Time (hh:mm) Please enter the displayed to prove I am not a robot :0

masha68 [24]

Answer:

07:45 or 7:45

Step-by-step explanation:

On a clock, the shorter hand shows the hour of the day, while the longer hand shows the minute. The clock is divided into 12 hours and 60 minutes. In this case, the shorter hand is between 7 and 8, and the minute hand is right at 45, meaning that the time is 07:45. Hope this helps!

5 0

3 years ago

16(4 1/4) distrubuted

ss7ja [257]

Answer:

Step-by-step explanation:

Step 1: Convert fraction to improper

4 1/4 = 16/4 + 1/4 = 17/4

Step 2: Multiply 16 and 17/4

16(17/4) = 272/4 = 68

8 0

3 years ago

Pls answer asap!!ty!! Please label the missing angles below.

marusya05 [52]

Answer:

Triangle A: 38 degrees

Triangle B: Unknown (not enough information)

Triangle C: Unknown (not enough information)

Triangle D: 70 degrees

Triangle E: 40 degrees

Step-by-step explanation:

Work for Triangle A: 90 + 52 = 142. 180 - 142 = 38.

Work for Triangle B: Unidentifiable because there is no indicator to tell you if any of the angles/lines are equal. Generally there will be a "double lined" indicator in the corners of which a triangles angles are equal.

Work for Triangle C: Same as B.

Work for Triangle D: 90 + 20 = 110. 180 - 110 = 70.

Work for Triangle E: 90 + 50 = 140. 180 - 140 = 40.

7 0

3 years ago