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3 years ago

Please I need help it’s an emergency

Mathematics

2 answers:

liberstina [14]3 years ago

8 0

Answer:

i think its b

Step-by-step explanation:

i might be wrong but i think its

$4 \sqrt{3 }$

Rzqust [24]3 years ago

5 0

C i think
if it’s not correct don’t blame me i’m not sure if I did the math correctly

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Not that good at math, help please.

scZoUnD [109]

Answer:

center point: (-4, 2)

radius: 8 units

Step-by-step explanation:

To find the radius of a figure in a coordinate plane, you have to do x-y where x is the starting point and y is the ending point. so in this case:

-4-(-12)

= -4+12

= 8

3 0

2 years ago

Read 2 more answers

A model rocket is launched directly upward at a speed of 20 meters per second from the ground. The function f(t)=−4.9t2+20t, mod

Nataly [62]

Answer:

The rocket will reach its highest point about 2.04 seconds.

Step-by-step explanation:

The function:

$f(t)=-4.9t^2+20t$

Models the relationship between the height of the rocket and the time after launch t in seconds.

Since this is a quadratic function, the rocket will reach its highest point at its vertex. The vertex of a quadratic is given by:

$\displaystyle \Big(-\frac{b}{2a}, f\Big(-\frac{b}{2a}\Big)\Big)$

In this case, a = -4.9, b = 20, and c = 0. Thus:

$\displaystyle t=\frac{-(20)}{2(-4.9)}=\frac{10}{4.9}\approx 2.04$

The rocket reaches its maximum height after 10/4.9 or about 2.04 seconds.

Further Notes:

Then the maximum height of the rocket will be f(10/4.9):

$\displaystyle f\Big(\frac{10}{4.9}\Big)=-4.9\Big(\frac{10}{4.9}\Big)^2+20\Big(\frac{10}{4.9}\Big)\approx20.41\text{ feet}$

4 0

3 years ago

A box contains 8 $1’s 14 $5’s 9 $10’s 15 $20’s 2 $50’s and 7 $100’s

Serjik [45]

The total money is $2,178

5 0

4 years ago

PLEASE HELP PLEASE HELP

Tasya [4]

Answer:

4 mins.

Step-by-step explanation:

The full page would be represented by 1= 12/12 or 12*1/12, the you would have to multiply the time 1/3 by 12 = 12*1/3 =12/3= 4.

4 0

3 years ago

Read 2 more answers

"A supplier of digital memory cards claims that no more than 1% of the cards are defective. In a random sample of 600 memory car

Nady [450]

Answer:

Both the values fall in the critical region so we reject H0: p ≤ 0.01 and conclude that the results are significantly different from chance identification and it is not a sample fluctuation.

Step-by-step explanation:

1) Formulate the hypothesis

H0: p ≤ 0.01 against the claim Ha: p > 0.01

2) Choose the significance level ∝= 0.01

3) The test statistics under H0 is

z= x -np /√npq ( without continuity correction)

z= x ± 1/2 -np /√npq ( with continuity correction)

4) the critical region is z> ±2.33 because the alternate hypothesis is stated on greater than basis.

5)Computations:

Z= x -np /√npq ( without continuity correction)

Z= 6- 600( 0.03)/√ 600( 0.03)(0.97)

z= - 2.82 ( without continuity correction)

z= x ± 1/2 -np /√npq ( with continuity correction)

Z= (6-0.5)- 600( 0.03)/√ 600( 0.03)(0.97)

z= -12.5/4.1785

z= -0.29915 ( with continuity correction)

6) Both the values fall in the critical region so we reject H0: p ≤ 0.01 and conclude that the results are significantly different from chance identification and it is not a sample fluctuation.

8 0

3 years ago