2 years ago

HElp wHat iS iT!?!?!??!

Mathematics

1 answer:

fomenos2 years ago

8 0

Answer:

Step-by-step explanation:

You might be interested in

Q #8 please solve my question

stealth61 [152]

The 2nd one. The one that says CD=DA, DA=ZX, AC=YZ

3 0

2 years ago

Read 2 more answers

What is the area of a rectangular garden that is 60 feet by 20 feet

levacccp [35]

Area = length * width

A = 60 * 20

A = 120 square feet

7 0

2 years ago

A road has a 10% grade, meaning increasing 1 unit of rise to every 10 units of run.

fenix001 [56]

The grade is the ratio of rise to run, i.e. the slope aka the tangent.

$\tan \theta = \dfrac{1}{10}$

$\theta = \arctan 0.1 \approx 5.711^\circ$

Answer: (a) 6 degrees

For part b, the road is the hypotenuse c of a right triangle whose tangent of the small angle is 1/10. The height h or rise is the side opposite the small angle.

$\sin\theta = \dfrac h c$

$h = c \sin \theta$

We could just take the sine of the angle we got but let's get it from the tangent exactly.

$\cos^2 \theta + \sin ^2 \theta = 1$

Dividing by squared cosine

$1 + \tan ^2 \theta = 1/\cos^2 \theta = 1/(1- \sin^2 \theta)$

$(1- \sin^2 \theta) = 1/(1 + \tan^2 \theta)$

$\sin^2 \theta = 1 - 1/(1 + \tan^2 \theta)$

$\sin^2 \theta = 1 - 1/(1 + (1/10)^2) = 1-1/(101/100) = 1/101$

$h = c \sin \theta = 2 \sqrt{1/101} \approx 0.199$

Answer: (b) Rise of 0.199 km

6 0

2 years ago

“ I need help with these . I’m trying my best so can u help .

Debora [2.8K]

Can not see it sorry

5 0

2 years ago

Read 2 more answers

Elizabeth earned a grade of 85% on her multiple-choice science final that had a total of 160 problems. How many problems on the

Naily [24]

Answer:

135

Step-by-step explanation: Multiply 160 by 0.85(for 85%) and you get 135

7 0

2 years ago