3 years ago

Find the exact value of Sin300°

Mathematics

1 answer:

ExtremeBDS [4]3 years ago

4 0

The exact value is $-\frac{ \sqrt{3}}{2} }$

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What is the value of f(-3)

Readme [11.4K]

$f(x)=\left\{\begin{array}{ccc}-2&if&x < -3\\4x&if&-3\leq x\leq-1\\x^2&if&x > -1\end{array}\right\\\\-3\leq-3\leq-1\to f(x)=4x\\\\f(-3)=4(-3)=-12$

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3 years ago

Our hearts beat approximately 70 times per minute. Express in scientific notation how many times the heart beats over a lifetime

earnstyle [38]

Answer:

2.69 x $10^{9}$

Step-by-step explanation:

We are given the heart's speed - 70 bpm

We count the number of minutes in 73 years :

1 year = 365 days
1 day = 24 hours
1 hour = 60 minutes
73 x 365 x 24 x 60 = 38,368,800 minutes

We multiply the heart's bpm with 73 years worth of minutes

38,368,800 x 70 = 2,685,816,000

Write the number in scientific notation = 2.68581 x $10^{9}$ ≈ 2.69 x $10^{9}$

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3 years ago

The figure is made up of a square and a rectangle. Find the area of the shaded region.

sergij07 [2.7K]

Answer:

Step-by-step explanation:

second box is nine because it is half of the 3 x 6 part

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3 years ago

An altitude is drawn from the vertex of an isosceles triangle, forming a right angle

romanna [79]

Answer:

54 in

Step-by-step explanation:

Use Pythagorean to find the missing side x of the triangle.

<u>It is a hypotenuse with other sides 18 in and half of 15 in:</u>

$x = \sqrt{18^2+(15/2)^2} =\sqrt{380.25} =19.5$

<u>The perimeter is:</u>

P = 2*19.5 + 15 = 54

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2 years ago

A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 410 gram setting. It is

Delvig [45]

Answer:

i think it is 451 i believe

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2 years ago