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3 years ago

Degree of precision 15.68 x 1.1

Mathematics

1 answer:

Vlad [161]3 years ago

8 0

Answer:

15.68×1.1 = 17.248 so if we see then it has 5 sig figs

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A ball is thrown straight up from the top of a 40 feet tall building with an initial speed of 24 feet per second. The height of

rjkz [21]

Answer:

1)The ball hits the ground after 3 seconds.

2)The maximum height of the ball is 49 feet

3)It takes 1.25 seconds to reach its maximum height

Step-by-step explanation:

Height of building = 40 feet

We are given that A ball is thrown straight up from the top of building with an initial speed of 24 feet per second.

So, The height of the ball as a function of time can be modeled by: $h(t)=-16t^2+40t+24$

1)After how many seconds the ball hit the ground.

Substitute h(t)=0

So, $-16t^2+40t+24=0\\-2t^2+5t+3=0\\2t^2-5t-3=0\\2t^2-6t+t-3=0\\2t(t-3)+1(t-3)=0\\(2t+1)(t-3)=0\\t=\frac{-1}{2} , 3$

Since time cannot be negative

So,the ball hits the ground after 3 seconds.

2)What is the maximum height of the ball?

It takes maximum height at vertex

Formula : $t = \frac{-b}{2a}$

$t=\frac{-40}{2(-16)}=1.25 seconds$

Substitute the value of t in function

$h(1.25)=-16(1.25)^2+40(1.25)+24\\h(1.25)=49 feet$

So,the maximum height of the ball is 49 feet

3).How long did it take for the ball to reach its maximum height?

It takes 1.25 seconds to reach its maximum height

6 0

4 years ago

The expression 12g

lbvjy [14]

34kilometers I think that is writght

4 0

4 years ago

Hi pls help. pls explain a bit thank you:)

DIA [1.3K]

Answer:

$a^3b^2c^6$

Step-by-step explanation:

$n^x*n^y=n^{x+y}$

$a^6*a^{-3}*a^0=a^{6-3+0}=a^3$

$b^3*b^1*b^{-2}=b^{3+1-2}=b^2$

$c^4*c^2=c^{4+2}=c^6$

put it all together

$a^3b^2c^6$

7 0

3 years ago

Insert three arithmetic means between 4 and 10.

Bumek [7]

Answer:

5.5, 7, 8.5

Step-by-step explanation:

Find the mean of 4 and 10, that is

$\frac{4+10}{2}$ = $\frac{14}{2}$ = 7

Now repeat with 4 and 7 and 7 and 10

$\frac{4+7}{2}$ = $\frac{11}{2}$ = 5.5

$\frac{7+10}{2}$ = $\frac{17}{2}$ = 8.5

Hence

4, 5.5, 7, 8.5, 10 ← is an arithmetic sequence with d = 1.5

4 0

3 years ago

Justin earned $50 mowing lawns and $34 washing cars. He wants to divide his money into 3 equal accounts. How much will he put in

castortr0y [4]

Answer:28

Step-by-step explanation:

Mowing 50

Car washing 34

Total amount 84

Now divide by 3 accounts 84/3=28

8 0

3 years ago