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3 years ago

1,323 miles 443 miles and 409 Round to nearest ten

Mathematics

1 answer:

kodGreya [7K]3 years ago

3 0

Answer:

470

Step-by-step explanation:

1323 rounds to 1320

443 rounds to 440

409 rounds to 410

1320 - (440 + 410) =

1320 - 850 =

470 <===

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After a baseball is hit, the height h (in feet) of the ball above the ground t seconds after it is hit can be approximated by th

lubasha [3.4K]

Answer:

The ball will take 4.05 seconds to hit the ground.

Step-by-step explanation:

we have

$h=-16t^{2}+64t+3$

This is a quadratic equation (vertical parabola) open down

The vertex is a maximum

we know that

The ball hit the ground when h=0

Solve the quadratic equation

For h=0

$-16t^{2}+64t+3=0$

The formula to solve a quadratic equation of the form

$at^{2} +bt+c=0$ is equal to

$t=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-16t^{2}+64t+3=0$

$a=-16\\b=64\\c=3$

substitute in the formula

$t=\frac{-64(+/-)\sqrt{64^{2}-4(-16)(3)}} {2(-16)}$

$t=\frac{-64(+/-)\sqrt{4,288}} {-32}$

$t=\frac{64(-)\sqrt{4,288}} {32}=-0.05\ sec$ ---> the time cannot be a negative number

$t=\frac{64(+)\sqrt{4,288}} {32}=4.05\ sec$

therefore

The ball will take 4.05 seconds to hit the ground.

4 0

3 years ago

-68 times the difference between a number and 11 is equal to the number one plus -94

Scilla [17]

Answer:

x=841/68

Step-by-step explanation:

-68(x-11)=1+(-94)

-68(x-11)=-93

-68x+748=-93

-68x=-93-748

-68x=-841

68x=841

x=841/68

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3 years ago

Victoria wants to save $500 for a vacation. She plans on saving $20 a day. If she already has $160 saved, what is the minimum nu

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Answer:

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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2 years ago

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Answer:

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