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3 years ago

8

3) Our next presidential election is in

1 answer:

Ierofanga [76]3 years ago

6 0

Answer:121

Step-by-step explanation:

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HELP I’m being timed!!!

BartSMP [9]

Answer:

b

Step-by-step explanation:

cause it is

8 0

3 years ago

Read 2 more answers

Please find the perimeter and area of these shapes

ladessa [460]

Answer:

ABC shaded area = 36 $\pi$ - 72 cm²

ABC shaded area perimeter = $6\pi +12\sqrt{2}$ cm

ABCD area = $\dfrac52 \pi$ cm²

ABCD perimeter = $3\pi +2$ cm

Step-by-step explanation:

<u>Shape ABC</u>

Assuming you want the area and perimeter of the shaded part of the shape only...

<u>Area</u>

Area of a sector = $\dfrac12r^2\theta$ (where r is the radius and $\theta$ <em> </em>

⇒ area of a sector = $\dfrac12 \times 12^2\times \dfrac{\pi}{2} =36\pi \ \textsf{cm}^2$

Area of triangle = 1/2 x base x height

⇒ area of triangle = 1/2 x 12 x 12 = 72 cm²

Therefore, area of shaded area = area of sector - area of triangle

⇒ area = 36 $\pi$ - 72 cm²

<u>Perimeter</u>

Arc length = $r\theta$ (where r is the radius and $\theta$ <em> </em>

⇒ arc length = $12\times\dfrac12\pi =6\pi \ \textsf{cm}$

Hypotenuse of triangle = $\sqrt{a^2+b^2}$ (where a and b are the legs of the right triangle)

⇒ hypotenuse = $\sqrt{12^2+12^2} =12\sqrt{2}$ cm

Therefore, perimeter = arc length + hypotenuse

⇒ perimeter = $6\pi +12\sqrt{2}$ cm

<u>Shape ABCD</u>

<u>Area</u>

Area of a semicircle = $\dfrac12 \pi r^2$ (where r is the radius)

⇒ area of large semicircle ABC = $\dfrac12 \times \pi \times 2^2=2\pi \ \textsf{cm}^2$

⇒ area of small semicircle AD = $\dfrac12 \times \pi \times 1^2=\dfrac12\pi \ \textsf{cm}^2$

⇒ area of shape ABCD = $\dfrac12 \pi + 2 \pi=\dfrac52 \pi \ \textsf{cm}^2$

<u>Perimeter</u>

1/2 circumference = $\pi r$

⇒ perimeter = $2\pi +2+\pi=3 \pi+2 \ \textsf{cm}$

7 0

2 years ago

1/4 divided by 6 is ___

creativ13 [48]

Answer:

1/24

Step-by-step explanation:

1/4*1/6=1/24

7 0

3 years ago

If a coin is tossed twice what is the probability that on the first toss the coin lands heads and on the second toss the coin la

olganol [36]

The odds it lands on head the first time is .5. The odds it lands on tails the second time is .5. You multiply these together to get .25.

4 0

3 years ago

A man drives from his home at 30 miles per hour to a shopping mall that is 20 miles from his home. On the return trip, he encoun

Sati [7]

First half: 30 miles per hour for 20 miles. Time taken:

$d=st \iff t=\dfrac{d}{s}=\dfrac{30}{20}=1.5$

Second half: 12 miles per hour for 20 miles. Time taken:

$d=st \iff t=\dfrac{d}{s}=\dfrac{30}{12}=2.5$

In total, he traveled 60 (30+30) miles in 4 hours (1.5+2.5), for an average speed of

$s=\dfrac{d}{t}=\dfrac{60}{4}=15$

6 0

3 years ago