Step-by-step explanation:
a = 12√3
b = 24
hope this helps
number is 3.8
subtract 4 from -15 then divide by five
Considering the ballon to be spherical
It's volume is given by 4/3(π r^3) by differentiating volume with respect to time we get rate of change of volume hence,
4πr^2(dr/dt)=600÷60=10
Substituting r=30cm
4π(30)*(30)(dr/dt)=10
dr/dt=rate of increase in bullion's radius=1/(360π)cm/s
Option C: Clifton takes 6 minutes and 30 seconds to run one mile.
Explanation:
Given that Clifton ran 6 miles in 39 minutes.
We need to determine the time it takes for Clifton to run one mile.
To determine the time that it takes for Clifton to run one mile, we shall divide 39 minutes by 6 miles.
Thus, we have,

-------(1)
To convert 0.5 minutes to seconds, let us multiply the value by 60.
Thus, we have,

Thus, substituting in equation (1), we have,

Therefore, it takes 6 minutes and 30 seconds for Clifton to run one mile.
Hence, Option C is the correct answer.
Answer:
X = 75
Step-by-step explanation:
here, DY || FS ,
SO, Angle DFS = Angle JDY
( Corresponding angle pair )
Angle JSF = Angle JYD
( Corresponding angle pair )
Hence, triangle JDY ~ JFS ( By AA CRITERIA )
Now, JY / YS = JD / DF
=》42 / 63 = 50 / X
=》X = 50/42 × 63
=》X = 75
i hope you got it