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3 years ago

Hi, I'm struggling with these Areas & Perimeters.

Mathematics

1 answer:

bazaltina [42]3 years ago

8 0

V=(3.14)(40^2)(1.3)

V=(3.14)(1600)(1.3)

V=5024(1.3)

V=6531.2

Circumference of semicircle: (2*3.14*17)/2=53.38

CM to M: 4000/100=40, 700/100=7

40+10+7+34+53.38+33+68+10=255.35

Perimeter=255.35m

Area of semicircle: (3.14*17^2)/2=453.73

40*10=400m^2

68*33=2244m^2

400+2244+453.73=3097.73

Area=3097.73m^2

100*75=7500

Area of semicircle: (3.14*25^2)/2=981.25

7500-981.25=6518.75

Area of car park not including the arena=6518.75m^2

Meters to Centimeters: 0.4*100=40

45*40*50=90000

Centimeters to Meters: 90000/100=900

Volume=900m^3

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4x-2y=8(x-3) x= ? y= ?

Rainbow [258]

x = -6 y/2

y = -2x + 12

hope that helped

6 0

2 years ago

Makayla is working two summer jobs, making $19 per hour tutoring and making $12 per hour landscaping. In a given week, she can w

Ivanshal [37]

Answer: 12 hours

Step-by-step explanation:

3 hours landscaping = $36

She still needs to make $224 to meet her requirement.

$224 divided by $19 tutoring = 11.79 hours

224÷19=11.79

Rounded to the nearest whole number: 12

This would mean Makayla worked a total of 15 hours and made $264. Which meets her requirements.

8 0

3 years ago

10% of £22 5% of £22 15% of £22 —————- please help!

dybincka [34]

Step-by-step explanation:

10% of £22

10/100×22/1

2.2%

5% of £22

5/100×22/1

1.1%

15% of 22£

15/100×22/1

3.3%

5 0

2 years ago

I need to factor 7r^2+6r-16

weeeeeb [17]

I hope this helps you

7r^2+6r-16

7r -8

r +2

(7r-8)(r+2)

6 0

2 years ago

Show full work asap!!!

zloy xaker [14]

Answer:

Stain required to stain the ramp = 2 quarts

Step-by-step explanation:

Area of the wheelchair ramp to be stained = Surface area of the ramp - Area of the rectangular base

Surface area of the ramp = 2(area of the triangular base) + (perimeter of the base)(height)

Area of the triangular base = $\frac{1}{2}(\text{Base})(\text{Height of the triangle})$

= $\frac{1}{2}(25)(\frac{25}{12})$

= $\frac{625}{24}$ in²

Perimeter of the triangular base = $25\frac{1}{12}+25+\frac{25}{12}$

= 25 + $\frac{1}{12}$ + 25 + $\frac{25}{12}$

= 50 + $\frac{26}{12}$

= 50 + $2+\frac{2}{12}$

= $52\frac{1}{6}$ ft

Surface area of the ramp = $\frac{625}{12}$ + $(52\frac{2}{12})\times 5$ - 25×5

= $\frac{625}{12}+\frac{3130}{12}-125$

= $\frac{3755}{12}-125$

= 187.92 square feet

Since, 100 square feet area is covered by the stain = 1 quart

Therefore, 187.92 square feet will be covered by the stain = $\frac{187.92}{100}$

= 1.8792

≈ 2 quarts

6 0

3 years ago