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3 years ago

Find the exact value of sin (-270 degrees).

1 answer:

3 0

The exact value of sin (-270) is determined using the calculator in degrees mode. The answer is equal to 1. If the radians mode is used, -270 is equal to -2 pi/3. Hence using the calculator, we can verify that the answer is still 1. The value of -270 matters.

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Diana owns a novelty shop in downtownSan Antonio. She ordered a shipment of48 party hats. Of the 48 hats that sheordered, 25% we

ioda

We can calcualte the number of blue hats by multiplying the total number of hats (n=48) by the proportion of blue hats (p=25%=0.25).

Then:

$B=n\cdot p=48\cdot0.25=12$

There are 12 blue hats.

3 0

2 years ago

I have 3 green cubes, 4 red cubes, 2 black cubes, and 6 yellow cubes. What is the probability that I will randomly choose a blac

Strike441 [17]

Answer:

4/75 or 0.05333

Step-by-step explanation:

3+4+2+6=15 elements

2/15= probability to choose a black

6/15 = probability to choose a yellow cube

Probability to choose a black AND (*) a yellow = 2/15*6/15=12/225=4/75 or 0.05333

6 0

3 years ago

420 student 25 times 3 times the number of girls 2 times the number of boys how many girls amd how many boys

Georgia [21]

Complete Question

We have a total of 420 students. 2 times 3 times the number of girls is equal to 2 times the number of boys how many girls and how many boys

Answer:

The number of boys = x = 315 boys

The number of girls = y = 105 girls

Step-by-step explanation:

Let

The number of boys = x

The number of girls = y

We have 420 students

2 times 3 times the number of girls is equal to 2 times the number of boys

x + y = 420..... Equation 1

2 × 3y = 2x

6y => 2x

x => 6y/2 = 3y

We substitute 3y for x in Equation 1

3y + y = 420

4y = 420

y =>420/4

y => 105

Solving for x

x = 3y

x = 3 × 105

x = 315

Therefore,

The number of boys = x = 315 boys

The number of girls = y = 105 girls

4 0

3 years ago

Somebody please help

pickupchik [31]

Answer:

Step-by-step explanation:

The volume is LWH

L = 16

W = 9

H = 12

16 * 9 * 12 = 1728

4 0

3 years ago

a ball is thrown into the air with an upward velocity of 36 ft/s. it’s height h in feet after t seconds is given by the function

lukranit [14]

Complete the square:

$h(t)=-16t^2+36t+9=-16\left(t^2-\dfrac94t\right)+9=-16\left(\left(t-\dfrac98\right)^2-\dfrac{81}{64}\right)+9$

$h(t)=-16\left(t-\dfrac98\right)^2+\dfrac{117}4$

That is, the graph of $h(t)$ is a parabola with vertex at $(t,h(t))=\left(\dfrac98,\dfrac{117}4\right)$ , meaning the ball reaches its maximum height of $\dfrac{117}4=29.25\,\mathrm{ft}$ after $t=\dfrac98=1.125\,\mathrm s$ of being thrown.

5 0

3 years ago