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shtirl [24]
3 years ago
10

Find the area of the circle. Use 3.14 for . 80 yd The area of the circle is about yd2?

Mathematics
2 answers:
Aleksandr [31]3 years ago
5 0

Step-by-step explanation:

A =nr²

=3.14 × (80/2)

=3.14 × 40

= 125.6yd²

Natali [406]3 years ago
5 0
3.14 x r^2
3.14 x 6,400
= 20, 096
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The sales tax in your city is 4.4%, and an item cost $3 before tax
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Step-by-step explanation:

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The size 4 soccer ball Sean’s team uses should weigh no more than 0.37 kilograms, and no less than 0.31 kilograms. A soccer bag
dmitriy555 [2]

Answers:

Q: What is the most they could weigh together?

A:  0.74 kg

-----

Q: What is the least they could weigh together?

A:  0.62 kg

=================================================

Work Shown:

x = weight of first ball

y = weight of second ball

each ball has a weight range of 0.31 kg to 0.37 kg, so,

0.31 \le x \le 0.37

0.31 \le y \le 0.37

add straight down to get

0.31+0.31 \le x+y \le 0.37+0.37

which simplifies to

0.62 \le x+y \le 0.74

the two soccer balls have a weight range of 0.62 to 0.74, inclusive of both endpoints.

--------

Without using algebra, you basically just add the smallest the two weights could be (0.31) to itself to get 0.31+0.31 = 0.62 which represents the smallest the two weights combined can be. The same happens with the largest weight of 0.37 to get 0.37+0.37 = 0.74 as the max weight of both objects together.

7 0
3 years ago
A radioactive nuclide has a half-life of 10 days. At what rate does the substance decay each day?
oksano4ka [1.4K]

Answer:

6.7% decrease each day

Step-by-step explanation:

Half life: 10 days

Fraction = 0.5^(t/10)

Where t is the no. of days

Per day: t = 1

0.5^(1/10)

0.9330329815 × 100 = 93.30329917

Decrease of: 100 - 93.30329917

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6 0
3 years ago
NEED THE ANSWER ASAP <br> MARKING BRAINLIEST
Phantasy [73]

Answer:

A=74.24 f^2

Step-by-step explanation:

Triangle:

1/2 x 6x 8

=24

Half a circle

3.14x 4^2 ÷ 2

=25.12

Then plus it together

24+25.12

=49.12 ft

3 0
3 years ago
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