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3 years ago

Kiera's dance class starts at 4:30pm and ends at 6:15 pm how long is her dance class

Mathematics

1 answer:

svp [43]3 years ago

8 0

Kiera's dance class is 1 hour and 45 minutes long (1:45)

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You and your friends have decided to camp for a night. Your friend claims the perimeter of his tent is 7.5 metres.

Georgia [21]

Perimeter =8.2
the friend is incorrect

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3 years ago

Find the surface area of the regular pentagonal pyramid.

mr_godi [17]

Area of each side triangle is 1/2*8*15 = 60. There are 5 of them so the triangles have surface area 300. the pentagon's area 1/2*apothegm*sidelength*sides = 1/2*5.5*8*5 = 110. The total area is therefore 300+110 = 410

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3 years ago

What is the shaded portion of the circle

blagie [28]

Answer:

$(5\pi-11.6)\ ft^{2}$

Step-by-step explanation:

we know that

The area of the shaded region is equal to the area of the sector minus the area of the triangle

step 1

Find the area of the circle

the area of the circle is equal to

$A=\pi r^{2}$

we have

$r=5\ ft$

substitute

$A=\pi (5)^{2}$

$A=25\pi\ ft^{2}$

step 2

Find the area of the sector

we know that

The area of the circle subtends a central angle of 360 degrees

by proportion find out the area of a sector by a central angle of 72 degrees

$\frac{25\pi}{360}=\frac{x}{72}\\ \\x=72*25\pi /360\\ \\x=5\pi\ ft^{2}$

step 3

Find the area of triangle

The area of the triangle is equal to

$A=\frac{1}{2}(2.9+2.9)(4)= 11.6\ ft^{2}$

step 4

Find the area of the shaded region

Subtract the area of the triangle from the area of the sector

$(5\pi-11.6)\ ft^{2}$

8 0

3 years ago

ANSWER PLEASE I WILL MARK AS BRAINLIEST

ICE Princess25 [194]

Answer:

162 mL

Step-by-step explanation:

1.Convert all volumes to millilitres

(a) Chlorpheniramine

V = 100 mL

(b) Lidocaine

$V = \text{2 fl oz} \times \dfrac{\text{29.57 mL}}{\text{1 fl oz}} = \textbf{59 mL}$

(c) Banana flavouring

$V = \dfrac{1}{2}\text{ tsp} \times \dfrac{\text{4.928 mL}}{\text{1 tsp}} = \textbf{2.5 mL}$

2.Calculate the total volume

Chlorpheniramine = 100 mL

Lidocaine = 59

Banana flavouring = <u> 2.5 </u>

TOTAL = 162 mL

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3 years ago

For a school fund-raiser, 10 students sold a total of 90 boxes of cookies. Which of the following can be calculated from this in

allsm [11]

Answer: what of the following

Step-by-step explanation:

6 0

3 years ago

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Kiera's dance class starts at 4:30pm and ends at 6:15 pm how long is her dance class ​

Kiera's dance class starts at 4:30pm and ends at 6:15 pm how long is her dance class