3 years ago

Solve for an angle in right triangles help

Mathematics

1 answer:

Sphinxa [80]3 years ago

5 0

Answer:

71.57

Step-by-step explanation:

Tangent = opposite over adjacent (sides)

TanA = ( 9/3 )

A = $Tan^{-1}$ (3)

A = 71.57

You might be interested in

Rearrange the equations.<br> ^ photo

Natalija [7]

A=b-2
c=d/3
e=2f+5
hope this helps

4 0

3 years ago

Find the value of k for which the given function is a probability density function. f(x = kekx on [0, 2]

liraira [26]

Reading this as

$f_X(x)=\begin{cases}ke^{kx}&\text{for }x\in[0,2]\\0&\text{otherwise}\end{cases}$

For $f_X(x)$ to be a valid PDF, the integral over its support must equal 1:

$\displaystyle\int_{-\infty}^\infty f_X(x)\,\mathrm dx=\int_{x=0}^{x=2} ke^{kx}\,\mathrm dx=1$

Let $y=kx$ , so that $\dfrac{\mathrm dy}k=\mathrm dx$ and the integral becomes

$\displaystyle\int_{y=0}^{y=2k}ke^y\,\dfrac{\mathrm dy}k=\int_0^{2k}e^y\,\mathrm dy=e^y\bigg|_{y=0}^{y=2k}=1$
$e^{2k}-e^0=1$
$e^{2k}-1=1$
$e^{2k}=2$
$\ln e^{2k}=\ln2$
$2k=\ln 2$
$k=\dfrac{\ln 2}2=\ln\sqrt2$

8 0

4 years ago

What is the slope of a vertical line?

alukav5142 [94]

Answer:

= unidentified

Step-by-step explanation:

6 0

3 years ago

Manny works in a toy store that sells marble. he puts 10 marbles in each bag and 2/10 of the marbles are striped. If manny makes

Triss [41]

12 marbles because 10 marbles per bag 3 bags soooo 4*3=12

5 0

3 years ago

What is the surface area

nexus9112 [7]

Answer:

A 1759 sq. units

Step-by-step explanation:

to find the surface area of a closed cylinder the formula is

2πr² + πdh

r = radius = 10

d = diameter = 10 + 10 = 20

2 x 3.14 x 10² + 3.14 x 20 x 18

628.3 + 1130.94 = 1759.24

ans = 1759

5 0

4 years ago