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3 years ago

An arrow is shot vertically upward from a platform 25ft high at a rate of 172⁢ft/sec. When will the arrow hit the ground?

1 answer:

6 0

Hello,

 h= -16t^2+185t+10, h = 0 when it hits the ground
16t^2+185t+10 = 0
t = 11.6sec (to nearest tenth)

Hope this helps

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Write the equation of a sine function that has the following characteristics.

slava [35]

Answer:

$\displaystyle y = 7\sin(9\pi(x + {1}/{4}) )$

Step-by-step explanation:

we are given

Amplitude:7
Period:9π
Phrase shift:¼

remember that,

$\displaystyle y = A \sin(B(x + C) )+ D$

where A is the Amplitude

B is the Period

C is the Phase shift

D is the vertical shift

note that, since D isn't given we'll take it 0

altogether substitute:

$\displaystyle y = 7\sin(9\pi(x + {}^{1}/_{4}) )+ 0$

hence,

our equation is

$\displaystyle y = 7\sin(9\pi(x + {}^{1}/_{4}) )$

and we are done!

5 0

3 years ago

Read 2 more answers

Which is the mode of this data? 12, 19, 22, 17, 15, 18, 15, 14, 16

Snezhnost [94]

Answer: 15
REMEMBER: The mode is the value that appears most frequently in a data set.

4 0

3 years ago

Sammy's Sandwich Shop has a mean delivery time of 25 minutes with a standard deviation of 2 minutes. Determine the z-score for t

fiasKO [112]

Answer:

-1

Step-by-step explanation:

Given: Mean= 25 minutes.

Standard deviation= 2 minutes

x= 23 minutes.

Lets find the z-score for the number of sandwiches delivered in less than 23 mins.

Formula: Z-score= $\frac{x-mean}{standard\ deviation}$

Z-score= $\frac{23-25}{2}$

⇒ Z-score= $\frac{-2}{2}$

∴ Z-score will be -1

Hence, -1 is the z-score for the number of sandwiches delivered in less than 23 minutes.

6 0

3 years ago

. What does the line y = 3x - 7 look like

Norma-Jean [14]

y = 3x - 7

3 = slope
-7 = y intercept

This line would cross the y intercept at -7, and go up by 3 (slope).

8 0

3 years ago

Find the area 54 cm 85 cm 170 cm (My answer) 27 cm

Sergeu [11.5K]

If you add 17+17+10+10=54. Hope that helps.

8 0

4 years ago