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jarptica [38.1K]
3 years ago
5

(1 point) A rock is thrown into a still pond and causes a circular ripple. If the radius of the ripple is increasing at a rate o

f 4 feet per second, how fast is the circumference changing when the radius is 18 feet?
Mathematics
1 answer:
PtichkaEL [24]3 years ago
8 0

Answer:

8pi feet per second

Or, 25.1 feet per second (3 sf)

Step-by-step explanation:

C = 2pi×r

dC/dr = 2pi

dC/dt = dC/dr × dr/dt

= 2pi × 4 = 8pi feet per second

dC/dt = 25.1327412287

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fiona draws a 24 centimeter rectangle.gregory draws a 24 square inch rectangle.whose rectangle is in area .how do you know
Valentin [98]

Answer:

Therefore we come to a conclusion that,

Gregory's Rectangle is in Area.

Step-by-step explanation:

Given:

Fiona draws a 24 centimeter rectangle.

Gregory draws a 24 square inch rectangle.

To Find:

Whose rectangle is in area = ?

Solution:

Rectangle has a dimension as

Length and Width which are in meters, centimeters, inches, feet, units, etc.

For Area

Area\ of\ Rectangle=Length\times Width

here units are getting Multiplied so it becomes

unit × unit = unit²  = square units

m × m = m² =square meter

inch × inch = inch² =square inches

Hence Area is calculated in square units.

Therefore we come to a conclusion that,

Gregory's Rectangle is in Area.

6 0
3 years ago
Please help me with this problem​
victus00 [196]

Answer:

c

Step-by-step explanation:

y+3=\sqrt{\frac{x}{16}+2 } \\y=\sqrt{\frac{x+32}{16} } -3\\y=\frac{1}{4} \sqrt{x-(-32)} +(-3)\\so ~C

5 0
3 years ago
1) how many significant digits are there in the sum of 45.10 and 102.203?
Sergio039 [100]
Oi  :)

1) There are 3 significant digits
45.10+102.203= 147.303

2)
15 Mi/h  =  22 ft/s

3)
C= 72*m* \frac{3}{4} \\  \\ C= 72*81* \frac{3}{4} \\  \\ C= \frac{17496}{4}  \\  \\ C=4374

4)
There are 4 significant digitis. Leter C 
7 0
3 years ago
Given g(x)=-2x-4find g(6)
Butoxors [25]

Answer:

g(6)=-16

Step-by-step explanation:

g(6)=-2(6)-4

g(6)=-12-4

g(6)=-16

Hope this helps lol

3 0
2 years ago
what is the y intercept of the line with a slope of - 4/7 that also passes through the point (7 , - 7/2) ?
kondor19780726 [428]

The answer is the last option: \frac{1}{2}

Explanation:

1. You have that the equation of the line is:

y=mx+b

Where m is the slope of the line and b is the intercept with the y-axis.

2. Therefore, you must find b.

3. Then, you must substitute the points given in the problem and the slope into the equation of the line and solve for b, as following:

y=mx+b\\-\frac{7}{2}=(-\frac{4}{7})(7)+b\\-\frac{7}{2}=-4+b\\b=\frac{1}{2}

8 0
3 years ago
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