2 years ago

Help please!! Will mark as brainliest

Mathematics

2 answers:

EastWind [94]2 years ago

8 0

Answer:

Step-by-step explanation:

i guess

ad-work [718]2 years ago

3 0

I think it’s letter B,I guess

You might be interested in

Steve uses an app that shows him how many kilometers he has run to prepare for a marathon. The app said he ran 6.436 kilometers.

aivan3 [116]

7 miles is what Steve ran

8 0

3 years ago

Read 2 more answers

Tim can complete 30 questions per hour how many questions can he complete in 1/3 of an hour

DanielleElmas [232]

Answer:

Step-by-step explanation:

1/3 of an hour is 20, and 1/3 of 30 questions is 10, so 10 questions completed per 20 minutes.

8 0

3 years ago

Read 2 more answers

A student believes that less than 50% of students at his college receive financial aid. A random sample of 120 students was take

marusya05 [52]

Answer:

p= 0.9995 and we can conclude that students receiving aid is more than 50% according to the sample results in 2% significance level.

Step-by-step explanation:

$H_{0}$ : less than or equal 50% of students at his college receive financial aid

$H_{a}$ : more than 50% of students receive financial aid.

According to the nul hypothesis we assume a normal distribution with proportion 50%.

z-score of sample proportion can be calculated using the formula:

z= $\frac{X-M}{\frac{s}{\sqrt{N} } }$ where

X is the sample proportion (0.65)
M is the null hypothesis proportion (0.5)
s is the standard deviation of the sample ( $\sqrt{0.5*(1-0.5)}$ )
N is the sample size (120)

then z= $\frac{0.65-0.50}{\frac{\sqrt{0.25}}{\sqrt{120} } }$ ≈ 3,29

thus p= 0.9995 and since p<0.02 (2%), we reject the null hypothesis.

4 0

3 years ago

A particle is moving along the x-axis so that its position at t ≥ 0 is given by s(t) = (t)In(5t). Find the acceleration of the p

Anika [276]

position = s(t) = (t)In(5t)

velocity = ds/dt = t d/dt (ln (5t)) +d/dt (t) ln (5t)

= t * 5 1/5t + ln (5t)

= 1 + ln (5t)

acceleration = dv/dt = d^2s/dt^2 = d/dt (1 + ln(5t))

=d/dt (1) + d/dt (ln 5t)

= 0 + 1/5t * 5

= 1/t

0 = 1 + ln (5t)

-1 = ln (5t)

e^-1 = 5t

1/e = 5t

1/(5e) =t

acceleration = 1/t = 1/(1/5e) = 5e

Answer: 5e

5 0

3 years ago

A doghouse is to be built in the shape of a right trapezoid, as shown below. What is the area of the doghouse?

Pachacha [2.7K]

Answer is B
area for a trapezoid is [( Base 1 + Base 2 ) * height] /2
which in this case would be [( 7 + 10 ) * 7]/2
(17)7/2
59.5

4 0

2 years ago

Read 2 more answers