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nirvana33 [79]
2 years ago
11

A runner ran 2/3 of a race in 21 minutes. They ran the entire race at a constant speed How long did it take to run the entire ra

ce?
Mathematics
1 answer:
Elenna [48]2 years ago
8 0

Answer:

31.5 minutes

Step-by-step explanation:

21 / 2 = 10.5

10.5 x 3 = 31.5

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Giving brainliest and alot of points! A projectile is launched at an angle (θ) of 36° and travels a distance of 375 feet; gravit
abruzzese [7]

Answer:

(c) 112 ft/sec

Step-by-step explanation:

4 = 112.33 ft/sec = 112 ft/sec

6 0
1 year ago
the main rotor of a helicopter rotates 430 times per minute. find the number of degrees through which a point on the main rotor
n200080 [17]

Answer:

2580 degrees rotated per second

Step-by-step explanation:

since  you have to find the degrees it rotates per second.

you need to divide 430 by 60 to find rotations per second

1)          430/60

             =  7.16666667 rotations per second

-then you have to multiply it by 360 degrees ,because their is 360 degrees in a circle

2)        7.16666667 (360)

            =  2580 degrees rotated per second

6 0
3 years ago
Evaluate k to the 6th power times p to the -7 power when k is 2 and p is -1
Solnce55 [7]

\bf ~~~~~~~~~~~~\textit{negative exponents}
\\\\
a^{-n} \implies \cfrac{1}{a^n}
\qquad \qquad
\cfrac{1}{a^n}\implies a^{-n}
\qquad \qquad a^n\implies \cfrac{1}{a^{-n}}
\\\\[-0.35em]
\rule{34em}{0.25pt}\\\\
k^6p^{-7}~~
\begin{cases}
k=2\\
p=-1
\end{cases}\implies (2)^6(-1)^{-7}\implies \cfrac{2^6}{(-1)^7}\implies \cfrac{64}{-1}\implies -64

7 0
3 years ago
2. Determine the amount of an investment if $5,000 is
Nataliya [291]

Step-by-step explanation:

A=P(1+i)^n

=5,000(1+5%/4)^10×4

=$8,218.10

8 0
2 years ago
5. Which point lies on the line: y - 4 = -3(x + 2)?
Karo-lina-s [1.5K]

Answer:

(- 2, 4 )

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

y - 4 = - 3(x + 2) ← is in point- slope form

with (a, b ) = (- 2, 4 )

7 0
3 years ago
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