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2 years ago

Please help me my Math Grade Is a D-

Mathematics

2 answers:

soldi70 [24.7K]2 years ago

7 0

Answer 18

Step-by-step explanation:

puteri [66]2 years ago

5 0

The question answer is 18

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In 2005, there were 74,250 car accidents. In 20,187 of them, the driver was a

zhuklara [117]

Answer:

27.19% probability that a female driver was involved in an accident

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

In this question:

74,250 car accidents. Of those, in 20,187, the driver was a female.

Based on this, what is the probability that a female driver was involved in an accident?

p = 20187/74250 = 0.2719

27.19% probability that a female driver was involved in an accident

6 0

2 years ago

Precal help if you could could you answer both. Me finishing this helps me graduate.

oee [108]

Exercise 1:

The easiest way to compute powers of complex numbers is to write them in the form

$z = \rho e^{i\theta} = \rho(\cos(\theta)+i\sin(\theta))$

In this form, you have

$z^n = \rho^n e^{in\theta} = \rho^n(\cos(n\theta)+i\sin(n\theta))$

The magnitude of the number is given by

$z=a+bi \implies \rho = \sqrt{a^2+b^2}$

So, we have

$z=-1+\sqrt{3}i \implies \rho = \sqrt{1+3}=2$

As for the angle, we have

$z=a+bi \implies \theta = \text{atan2}\dfrac{b}{a}$

So, we have

$z=-1+\sqrt{3}i \implies \theta = \text{atan2}\left(\dfrac{-\sqrt{3}}{-1}\right) = -\dfrac{2\pi}{3}$

Finally,

$z=-1-\sqrt{3}i = 2\left(\cos\left( -\dfrac{2\pi}{3}\right) + i\sin\left( -\dfrac{2\pi}{3}\right)\right) \implies z^6 = 2^6\left(\cos\left( -4\pi\right) + i\sin\left(-4\pi\right)\right) = 64$

Exercise 2:

You simply have to compute the trigonometric function:

$\cos\left(-\dfrac{\pi}{4}\right) = \dfrac{\sqrt{2}}{2},\quad \sin\left(-\dfrac{\pi}{4}\right) = -\dfrac{\sqrt{2}}{2}$

So, we have

$z = \sqrt{2}\left(\dfrac{\sqrt{2}}{2} - i\dfrac{\sqrt{2}}{2}\right) = 1-i$

7 0

2 years ago

Three guinea pigs living in the same cage need at least 12 square feet of living spàce.Is a cage that measure 3 feet by 5 feet b

Arte-miy333 [17]

Yes, there is enough space . If the guinea pigs need 12 feet, and 5*3= 15 feet then they have enough.
( idk if means 12 feet of living space for each or all 3 , but here i hope it helps :) )

8 0

2 years ago

The midpoint of is M(4,-3) One endpoint is G(-2,2). find the coordinates of end point

motikmotik

The other endpoint is (10, -8

4 0

2 years ago

A semicircle has a diameter of 17.6 cm.

Ray Of Light [21]

Answer:

B. 45.23 cm

Step-by-step explanation: