1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alexxandr [17]
3 years ago
5

Hey! I would appreciate some help with this

Mathematics
1 answer:
arsen [322]3 years ago
4 0

Answer:

...

Step-by-step explanation:

since they give us the side opposite of the given angle(Opposite) and we are trying to find for a (Adjacent/side), so we use TOA

tan(30)= \frac{4}{a}

i see u dont want it solved but ill solve it anyways

since a is on the bottom then lets switch them

x=\frac{4}{tan30}

x= 6.928

You might be interested in
Which situation is best modeled by the equation 9+=16 9 + x = 16 ?
ehidna [41]
This is the all question?
8 0
3 years ago
Read 2 more answers
A closed box with a square base is to have a volume of 13 comma 500 cm cubed. The material for the top and bottom of the box cos
andrezito [222]

Answer:

x  =  1,5 cm

h  =  6  cm

C(min) = 135 $

Step-by-step explanation:

Volume of the box is :

V(b)  = 13,5 cm³

Aea of the top is equal to area of the base,

Let call  " x " side of the base then as it is square area is A₁ = x²

Sides areas are 4 each one equal to x * h  (where h is the high of the box)

And volume of the box is   13,5 cm³  = x²*h

Then   h  =  13,5/x²

Side area is :  A₂ =  x* 13,5/x²

A(b)  = A₁  + A₂

Total area of the box as functon of x is:

A(x)  = 2*x²  + 4* 13,5 / x

And finally cost of the box is

C(x)  = 10*2*x²   +  2.50*4*13.5/x

C(x)  = 20*x²  +  135/x

Taking derivatives on both sides of the equation:

C´(x)  =  40*x   -  135*/x²

C´(x)  = 0     ⇒      40*x   -  135*/x² = 0    ⇒  40*x³ = 135

x³  = 3.375

x  = 1,5 cm

And   h  =  13,5/x²     ⇒   h  =  13,5/ (1,5)²

h = 6 cm

C(min)  = 20*x²  + 135/x

C(min)  = 45  +  90

C(min)  = 135 $

8 0
3 years ago
Solve for X! Please help
WARRIOR [948]

The two given angles are vertical angles which mean they are the same:

9x + 72 = 4x + 112

Subtract 72 from bot sides:

9x = 4x + 40

Subtract 4x from both sides:

5x = 40

Divide both sides by 5:

X = 8

4 0
3 years ago
A researcher wants to test whether a certain sound will make rats do worse on learning tasks. It is known that an ordinary rat c
AveGali [126]

Answer:

So we reject the null hypothesis and accept the alternate hypothesis that rats learn slower with sound.

Step-by-step explanation:

In this data we have

Mean= u = 18

X= 38

Standard deviation = s= 6

1) We formulate the null and alternate hypothesis as

H0:  u = 18  against           Ha : u > 18  One tailed test .

2) The significance level alpha = ∝= 0.05 and  Z alpha has a value ± 1.645 for one tailed test.

3)The test statistics used is

Z= X- u / s

z= 38-18/6= 3.333

4) The calculated value of z = 3.33 is greater than the z∝ = 1.645

5) So we reject the null hypothesis and accept the alternate hypothesis that rats learn slower with sound.

First we set the criteria for determining the true of value of the variable. That whether the rats learn in less or more than 18 trials.

Then we find the value of z for the given significance value given and the test about to be checked.

Then the test statistic is determined and calculated.

Then both value of z and z alpha re compared. If the test statistics falls in the rejection region  reject the null hypothesis and conclude alternate hypothesis is true.

The figure shows that the calulated z value lies outside the given z values

4 0
3 years ago
How many numbers in the set 1-100 are divisible by 6 but not by 4
Savatey [412]
So you are asking how many x's can be written in the form 2*3*number=x
where number is not even
there are 50 odd numbers thereforr there are 50 numbers that satisfy your need
8 0
3 years ago
Other questions:
  • The graph represents function 1, and the equation represents function 2:
    11·1 answer
  • What is the slope of line m? PLEASE HELP !!!
    9·1 answer
  • Please someone help
    12·1 answer
  • Question in the picture!!!!!!!!
    5·2 answers
  • In November mr lees students read 50 books in December they read 40 books what is the percent increase or decrease in the number
    9·2 answers
  • 50 pennies weigh 135 grams. 1 ounce equals to 30 grams. How many ounces will 100 pennies weigh?
    14·1 answer
  • Approximate 5.7255 to the nearest thousand
    7·1 answer
  • URGENT PLEASE HELP Me WILL GIVE BRAIN f(x)=2^x (0,f(0)) and (4,f(4)) find the rate of change for this function
    13·1 answer
  • Jacob wanted to purchase a boat. The dealership offered the following payment terms for Jacob: an $800 down payment and $275 a m
    11·1 answer
  • In the figure diameter DE is drawn with the midpoint of the circle at C(-3; 2).
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!