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Liula [17]
2 years ago
5

A gardener can care for the Green's property in 5 hours. If his helper assists him, they can complete the job in 4 hours. How lo

ng will it take the helper to do the job?
Mathematics
1 answer:
PilotLPTM [1.2K]2 years ago
6 0

Step-by-step explanation:

Fraction of work done by Gardner in 1 hr = 1 / 5

Fraction of work done by Gardner and helper in 1 hr = 1 / 4

Fraction of work done by helper in 1 hr

= 1 / 4 - 1 / 5

= 1 / 20

<u>Time required by helper to complete work</u> :

= <u>20 hours</u>

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The function C(t) below relates outside temperature in degrees Fahrenheit to the number of cricket chirps per minute. It takes a
vekshin1
T is a linear function of C  ==>  T = mC + b     Each additional chirp C corresponds to an increase in T of 0.25  ==>  m = 0.25    T = 52 when C = 20  ==>  52 = 0.25(20) + b  ==>  b = 52 - 5 = 47   So T = 0.25C + 47    When C = 100 then T = 0.25(100) + 47 = 25 + 47 = 72   When C = 120 then T = 0.25(120) + 47 = 30 + 47 = 77 so the temperature range is between 72 and 77 when there are between 100 and 120 chirps per minute 
3 0
2 years ago
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Emily invests $5,000 in an
Gemiola [76]

Answer:

50 years

Step-by-step explanation:

use the simple interest formula :

PRT/100

P is the principle (5000)

R is the rate of interest (4)

T is the time taken (x- unknown)

the amount at the end is double the amount invested  = 5000*2 = 10000

(5000*4 * x )/100 = 10000

20000x/100=10000

20000x = 100*10000

20000x = 1 000 000

x= 1 000 000/ 20 000

x = 50

it will take<u> 50 years </u>

7 0
2 years ago
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Edin has £300 in his savings account.his bank offers him 5% simple intrest rate ped annum for a period of 3 years.how much intre
Marianna [84]

Answer:

$45

Step-by-step explanation:

We are given the following information;

  • Money invested (Principal) is $300
  • Rate of interest is 5% per annum
  • Time the money is invested is 3 years

We need to determine the amount of interest the money will earn after three years.

  • Simple interest is calculated by the formula;
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Therefore, in this case;

Simple interest = ($300 × 5 × 3) ÷ 100

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Thus, the money invested earned a simple interest of $45

3 0
2 years ago
How do you write 680,705 in expanded form??
atroni [7]

<em>Hello!</em>

<em>The expanded form is:</em>

<em>600,000 + 80,000 + 700 + 5</em>


<em>Toodles~</em>

4 0
2 years ago
What are the coordinates of the image of vertex R -3,4 after a reflection across the y-axis? (–4, 3) (4, –3) (–3, –4) (3, 4)
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The coordinate of the image after being reflected is R(3,4).

When dealing with reflection of a line or shape or a figure in the coordinate plane, especially if it is reflected across the y- axis, you just have to give the opposite of the given (original) x- coordinate in order to give a symmetric figure.
7 0
2 years ago
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