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Nitella [24]
3 years ago
13

Please helpppppppppp​

Mathematics
1 answer:
sp2606 [1]3 years ago
6 0

Answer:

D

Step-by-step explanation:

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Simplify the solution (2¼)½​
BlackZzzverrR [31]
I think the answer is 1 1/8
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2 years ago
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Brianna recorded the high temperatures in her town each day for 8 consecutive days. Her data are shown. 78 , 65, 72 , 80, 68 , 7
scZoUnD [109]

Answer:

D)50% of the temperatures are less than 77.5 degrees

Step-by-step explanation:

The correct amount of temperatures that are less than 77.5 degrees is 6/8, or 75%.  So D) is false.

8 0
3 years ago
Examine A ABC below.
Roman55 [17]

Answer:

  • DE║AC

Step-by-step explanation:

<u>Given relationships:</u>

DE = 2 AC

  • Incorrect. Should be DE = 1/2 AC

DE║AC

  • Correct

m∠BCA = 2(m∠BED)

  • Incorrect. Should be m∠BCA = m∠BED

DE = AC

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8 0
3 years ago
What is the area of radius = 10.8 in
Reptile [31]
The answer is 33.93 because if you do the raidus which is 10.8 times pie you should get 33.929 then round to the nearest tenth
6 0
2 years ago
During a regular respiratory cycle, the volume of air in liters in the human lungs can be described by the function V(t) = 0.173
guapka [62]

Answer:

<h3>A. about 3.4 seconds</h3>

Step-by-step explanation:

Given the volume of air in liters in the human lungs described by the function V(t) = 0.173t +0.15t^2 - 0.035t^3 where t is the time in seconds,

The beginning of this respiratory cycle for the lungs to fill to their maximum volume of air occurs when dV/dt = 0

dV/dt = 0.173 + 0.3t - 3(0.035)t²

dV/dt = 0.173 + 0.3t - 0.105t²

Since dV/dt = 0

0.173 + 0.3t - 0.105t² = 0

multiply through by -1

-0.173 - 0.3t + 0.105t² = 0

0.105t² -0.3t-0.173 = 0

Factorize;

t = 0.3±√0.3²+4(0.105(0.173))/2(0.105)

t = 0.3±√0.09+0.07266/0.21

t =  0.3±√0.16266/0.21

t = 0.30±0.4033/0.21

t = 0.7033/0.21

t = 3.349secs

t ≈ 3.4secs

Hence it will take about 3.4secs for the lungs to fill to their maximum volume of air

7 0
3 years ago
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