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tatuchka [14]
3 years ago
7

Two cars leave from the same point (A) and travel along a straight road, which are at angle of 78° to each other. If their speed

s are 120 km/h (truck) and 90 km/h (car) respectively, how far apart will they be after one half hour?
Mathematics
1 answer:
densk [106]3 years ago
7 0
T=(60cos78, 60sin78)

T=(12.47, 58.69)

C=45

d=√((45-12.47)^2+58.69^2)

d≈67.1km
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See your levels
OLEGan [10]

The correct answer is 12:16 P.M.

<h3>How to find when did Deb finish eating lunch ?</h3>

According to the problem,

  • Deb started doing yard work at 9:52 A.M.
  • After working for 1 hour and 48 minutes, she stopped to have lunch.
  • It took her 36 minutes to eat lunch.

∴ Time at which Dev finishes her lunch =

                  9:52 A.M.  + ( 1 hour and 48 minutes +  36 minutes )

                =   11:40 A.M. +  36 minutes = 12 : 16 P.M.

∴ Deb finish eating lunch at 12:16 P.M.

Find out more information about time calculations here: brainly.com/question/1933707

#SPJ2

7 0
2 years ago
Read 2 more answers
What is the opposite of -3/4
Lerok [7]
The opposite of -3/4 is 3/4.
4 0
3 years ago
Read 2 more answers
Below is the graph of f(x)= 2in(x) how would you describe the graph of g(x) = 4in(x)?
alukav5142 [94]
The amplitude of 4 ln x is always exactly twice the amplitude of 2 ln x.  

Please note:  You refer to a graph, but you have not shared this graph.  
Also please note:  The abbreviation for "natural logarithm" is ln x, not in(x).

"ln" stands for logarithm (natural).


6 0
3 years ago
A firecracker shoots up from a hill 145 feet high with an initial speed of 80 feet per second. Using the formula H(t) = -16t2 +
kiruha [24]
145 = -16 t² + 80 t +s
s = ?
v = v0 - at
0 = 80 - at
80 = at
s = 80 t - at²/2
s = 80 t - 80t/2
s = 40 t
Finally: 145 = -16 t² + 80 t + 40 t
16 t² - 120 t + 145 = 0
We will solve this quadratic equation:
t = [120 +√ ( (-120)²- 4 · 16 · 145 )] / 32
t = [120 + √ (14400 - 9280) ] / 32 
t = (120 + 71.55) / 32 = 5.98 ≈ 6 s
Answer:D) 6 seconds
3 0
3 years ago
A= 89cm root 2 square
Serga [27]

Considering the given area of the square, it is found that it's side length is an irrational number.

<h3>What is the missing information?</h3>

This problem is incomplete, but researching it on a search engine, it asks if the side length of the square of area 89 cm² is rational or irrational.

<h3>What is the formula for the area of a square?</h3>


The area of an square of side length s is given by s squared, as follows:

A = s².

In this problem, the area is of 89 cm², hence:

s² = 89.

s = sqrt(89).

The square root of 89 is a non-exact root, hence it cannot be represented by fraction and is an irrational number.

More can be learned about the area of a square at brainly.com/question/10489198

#SPJ1

5 0
1 year ago
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