You adjust the temperature so that a sound wave travels more quickly through the air. You increase the temperature from 30°C to 36°C. What's the velocity of the sound wave at this new temperature?
A. 350.0 m/s
B. 344.0 m/s
C. 352.6 m/s
D. 335.6 m/s

s

Expert answered|venne1890|Points 657|

Question|Asked by dmlharris

Asked 4/1/2019 9:30:47 AM

Updated 7/8/2019 7:29:20 AM

1 Answer/Comment

Rating

8

Sound waves can't travel through a vacuum.

Added 7/8/2019 7:29:20 AM

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The distance from the center of a round table top to the edge of the table top is 4 ft. What's the area of the table top?
A. 25.14 sq. ft.
B. 50.24 sq. ft.
C. 38 sq. ft.
D. 16 sq. ft.
**Weegy:** The distance from the center of a round table top to the edge of the table top is 4 ft. Area of the table top = pi x (r squared) = 3.14 x (4 x 4) = 3.14 x 16 = 50.24 sq ft. **User:** Store space in a shopping mall is often rented by the square foot. What's the area of a rectangular jewelry store that is 12 feet wide and 18 feet long?
A. 576 square feet
B. 288 square feet
C. 68 square feet
D. 216 square feet
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Question|Asked by dmlharris

Not Answered

Updated 7/8/2019 7:40:35 AM

1 Answer/Comment

Store space in a shopping mall is often rented by the square foot. The area of a rectangular jewelry store that is 12 feet wide and 18 feet long is 216 sq.ft.

Area = l*w =18*12 =216

Area = l*w =18*12 =216

Added 7/8/2019 7:40:35 AM

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If a triangle has a height of 14 inches and a base of 9 inches, what's its area?
A. 63 square inches
B. 46 square inches
C. 135 square inches
D. 126 square inches

Question|Asked by dmlharris

Not Answered

Updated 7/8/2019 7:40:15 AM

1 Answer/Comment

A triangle has a height of 14 inches and a base of 9 inches, the area is 63 square inches.

Area = (14*9)/2 = 126/2 = 63 square inches

Area = (14*9)/2 = 126/2 = 63 square inches

Added 7/8/2019 7:40:15 AM

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What is the radius of a circle with an area of 32.1 square feet?
A. 3.20 ft.
B. 5.23 ft.
C. 10.22 ft.
D. 4.75 ft.

Question|Asked by dmlharris

Not Answered

Updated 3/25/2019 11:15:47 AM

1 Answer/Comment

The radius of a circle with an area of 32.1 square feet is 3.20 ft.

A = pi * r^2

r = sqr(A/pi)

r = sqr(32.1/3.14)

r = 3.20 (rounded)

A = pi * r^2

r = sqr(A/pi)

r = sqr(32.1/3.14)

r = 3.20 (rounded)

Added 3/25/2019 11:15:47 AM

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Find the circumference of a circle that has an area of 452.16 square meters. (Use 3.1416 as the value of .)
A. 37.6992 meters
B. 12 meters
C. 75.3984 meters
D. 24 meters

Question|Asked by dmlharris

Not Answered

Updated 7/8/2019 7:41:24 AM

1 Answer/Comment

The circumference of a circle that has an area of 452.16 square meters is 75.3984 meter.

Area = pie *r^2 = 452.16

r^2 = 452.16 /3.14

r = 12

circumference = 2*pi*r

C = 2 * 3.1416 * 12 = 75.3984

Area = pie *r^2 = 452.16

r^2 = 452.16 /3.14

r = 12

circumference = 2*pi*r

C = 2 * 3.1416 * 12 = 75.3984

Added 7/8/2019 7:41:24 AM

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What's the area of a square computer screen with 21-inch sides?
A. 42 sq. in.
B. 220 sq. in.
C. 441 sq. in.
D. 84 sq. in. **Weegy:** The area of a square computer screen with 21-inch sides is 441 sq.inches . Area = a^2 = 21^2 = 21*21 = 441 **User:** If the area of a circle is 58 square feet, find the circumference.
A. 42.5 ft.
B. 22.35 ft.
C. 4.25 ft.
D. 26.99 ft. **Weegy:** if the area of a circle is 58 square feet, the circumference is 26.99 ft.
A = pi * r^2
r = sqr(A/pi)
r = sqr(58/3.1416)
r = sqr(18.46)
r = 4.2967
d = 4.2967 * 2
d = 8.5934
c = d * pi
c = 8.5934 * 3.1416
c = 26.99 (rounded) **User:** Sheri's freezer is 2 feet wide, 6 feet long, and 2 feet deep. What's the volume of her freezer?
A. 10 cubic feet
B. 4 cubic feet
C. 24 cubic feet
D. 12 cubic feet
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Question|Asked by dmlharris

Expert Answered

Asked 3/25/2019 11:00:35 AM

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