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Ierofanga [76]
3 years ago
9

What is the following answer for 7/4 x 10? (1) 14 (2) 18 1/4 (3) 28 (4)30 1/2

Mathematics
2 answers:
alekssr [168]3 years ago
6 0
The answer is 17.5
Answer:17.5
joja [24]3 years ago
3 0

Answer: 17.5

Step-by-step explanation:

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Which fraction is equivalent to 5(z+3)-4(1+p)?<br><br> A. 15z-4p<br> B. 5z+19+4p<br> C. 5z+11-4p
Mila [183]
C 5z+11-4p.

5(z+3)-4(1+p)
5z+15-4-4p
5z+11-4p
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3 years ago
What is two thirds of 8?
Luba_88 [7]
8x2=16, 16 over 3 is roughly 5.33. so 5 is roughly 2/3rds of 8. Use basic cross multiplication
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4 years ago
Which of the following data could be graphed using a dot plot?Select all that apply.
ExtremeBDS [4]

Answer:

what are the options?

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
An airplane climbs 100 feet during the first second after takeoff. In each succeeding second it climbs 100 feet more than it cli
tigry1 [53]

Answer:

15 seconds.

Step-by-step explanation:

∵ The distance covered by plane in first second = 100 ft,

Also, in each succeeding second it climbs 100 feet more than it climbed during the previous second,

So, distance covered in second second = 200,

In third second = 300,

In fourth second = 400,

............, so on....

Thus, the total distance covered by plane in n seconds = 100 + 200 + 300 +400......... upto n seconds

=\frac{n}{2}(2\times 100 + (n-1)100)  ( Sum of AP )

=\frac{n}{2}(200+100n-100)

=\frac{n}{2}(100+100n)

=50n+50n^2

Suppose the distance covered in n seconds is 12,000 feet,

\implies 50n+50n^2=12000

n+n^2=240

n^2+n-240=0

n^2+16n-15n-240=0

n(n+16)-15(n+16)=0

(n-15)(n+16)=0

\implies n=15\text{ or }n=-16

∵ n can not be negative,

Hence, after 15 seconds the plane will reach an altitude of 12,000 feet above its takeoff height.

6 0
3 years ago
Read 2 more answers
An assembled product is built by 10 worker who coordinate their task. A total of 100 units will be made. Time records indicate t
Brut [27]

Answer:

a) 86%

b) 2nd unit = 82 hs.

3rd unit = 75 hs

c) 100th unit = 36 hs

Step-by-step explanation:

We can model the learning curve for manufacturing the units as:

t=aX^b

where t is the time for the Xth unit, and a and b are parameters that we will calculate from the data,

We know that t(1)=95. Then, we have:

t(1)=a\cdot 1^b=95\\\\a=95

And we know that the fourth unit (X=4) take 71 hours to be completed (t(4)=71). Then, we can calculate the other parameter as:

t(4)=95\cdot4^b=71\\\\4^b=71/95\approx 0.7473\\\\b\cdot ln(4)=ln(0.7473)\\\\b=ln(0.7473)/ln(4)=-0.291/1.386\\\\b=-0.21

We have the model for the learning curve:

t=95X^{-0.21}

The learning rate percentage is calculated from the b parameter:

b=\dfrac{ln(LRP)}{ln(2)}=-0.21\\\\\\ln(LRP)=-0.21*ln(2)=-0.21*0.693=-0.1455\\\\LRP=e^{-0.1455}=0.86

The learning rate percentage is 86%.

b) The most likely times required for the 2nd and 3rd units are calculated with the model:

t(2)=95\cdot2^{-0.21}=95*0.864=82\\\\t(3)=95\cdot3^{-0.21}=95*0.794=75

c) If we use the model to calculate the time required for the 100th unit, we have:

t(100)=95\cdot100^{-0.21}=95*0.38=36

8 0
3 years ago
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