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kotegsom [21]
3 years ago
6

A crane is lowering a concrete block from a height of 270 feet above the ground at a constant rate 2.5 feet per second. which fu

nction can be used to determine h, the height, in feet, above the ground of the concrete block after 5 seconds?
Mathematics
1 answer:
patriot [66]3 years ago
7 0
First, we multiply 2.5 feet per second by the amount of seconds we are given.

2.5 * 5 = 12.5 feet

Now, let's subtract that number from 270 to find the height after 5 seconds.

270 - 12.5 = 257.5 feet above the ground.

After 5 seconds, the block is 257.5 feet above the ground.
Hope that helped!
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Write a function rule to represent the sequence 0.3,0.9,1.5,2.1<br> PLease help
liraira [26]

The rule for sequence is:

a_n=0.3+(n-1)(0.6)

Step-by-step explanation:

To write the function rule, we have to check first whether it is an arithmetic sequence or geometric sequence

So

We have to find the common difference first. Common difference is the difference between two consecutive terms of a arithmetic sequence.

So,

Here

a_1=0.3\\a_2=0.9\\a_3=1.5\\a_4=2.1\\d=a_2-a_1=0.9-0.3=0.6\\a_3-a_2=1.5-0.9=0.6

The common difference is same so the sequence is an arithmetic sequence.

The explicit formula for an arithmetic sequence is:

a_n=a_1+(n-1)d\\

Putting the values of d and a_1 we get,

a_n=0.3+(n-1)(0.6)

Hence,

The rule for sequence is:

a_n=0.3+(n-1)(0.6)

Keywords: Functions Rule, Arithmetic sequence

Learn more about arithmetic sequence at:

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What is the difference between 6z and z6
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6z - z^6

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Answer:  5z^6
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How many unit cubes would you need to make a model of a rectangular prism that is 4 units long × 3 units wide × 2 units high?
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Step-by-step explanation:

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The Weiland Computer Corporation is trying to choose between the following mutually exclusive design projects, P1 and P2:
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Answer:

a profitability index P1=1.27

profitability index P2= 1.41

b NPV P1 = $14145.01

NPV P2 = $6630.3

c YES ANSWERS ARE DIFFERENT due to fact that cash flows in P1 is higher than in P2

Step-by-step explanation:

profitability index or = <u> present value of an investment cash flows</u>=<u>67145.01</u>

benefit cost ratio                initial cost                                                  53000

For project 1 or P1                            

cost of capital 10 %                                                                        = 1.27

initial investment = $53,000 since year 0

Year   Cash flows (P1)$  present value of future cash flows PV

 1                  27,000                      24545.46

 2                 27,000                      22314.05

 3                 27,000                      20285.50

                                          Total = 67145.01

use the formula of  present value of future cash flows = C/(1+i)ⁿ

C = cash  = 27000

i = interest = 10%  = 10/ 100 = 0.1

n = year = 1

year 1 = 27000/(1+0.1)¹ = 24545.46

year 2 = 27000/(1.1)²     =    22314.05                  note n = 2

year 3 = 27000(1.1)³     =      20285.50

Profitability index = 1.27 > 1 thus it should be accepted

profitability index or = <u>present value of an investment cash flows</u>=<u>22630.30</u>

benefit cost ratio                initial cost                                                  16000

For project 1 or P1                            

cost of capital 10 %                                                                            = 1.41

initial investment = $16,000 since year 0

Year   Cash flows (P2)$  present value of future cash flows PV

 1                  9,100                     8272.73

 2                 9,100                      7520.6

 3                 9,100                     6836.97

                                          Total = 22630.30

use the formula of  present value of future cash flows = C/(1+i)ⁿ

C = cash  = 9100

i = interest = 10%  = 10/ 100 = 0.1

n = year = 1

year 1 = 9100/(1+0.1)¹ = 8272.73

year 2 = 9100/(1.1)²     =    7520.6                  note n = 2

year 3 = 9100(1.1)³     =      6836.97

Profitability index = 1.41 > 1 thus it should be accepted

Profitability index of P1 = 1.27 AND P2 1.41 SO Weiland Computer Corporation SHOULD TAKE P2

b Net Present Value (NPV) decision rule =∑ pv - initial investment required

P1 = 67145.01 - 53,000 = $14145.01

P2 = 22630.30 - 16000 = $6630.3

Weiland Computer should take P1 since P1  > P2 that is $14145.01 >$6630.3

C YES ANSWERS ARE DIFFERENT due to fact that cash flows in P1 is higher than in P2

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