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3 years ago

Write 8 in scientific notation

Mathematics

1 answer:

mihalych1998 [28]3 years ago

7 0

Answer:

8 x 10 ^0

Step-by-step explanation:

the reason why is because there is no 0 behind the 8 so the exponent could not say a number so it is just 0

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What is speed of sound in air at 100 degree celcius?

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Answer:

386m/s is the answer to your question

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3 years ago

Which shows how to determine the volume of the pyramid?

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Answer:

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2 years ago

Read 2 more answers

The height of an object tossed upward with an initial velocity of 120 feet per second is given by the formula h = −16t2 + 120t,

AleksAgata [21]

Answer:

7.5 seconds

Step-by-step explanation:

$h = - 16 {t}^{2} + 120t \\ \because \: we \: have \: to \: find \: the \: time \: required \: \\ for \: the \: object \: to \: return to \: its \: \\ point \: of departure. \\ \therefore \: plug \: h = 0 \: in \: the \: given \: euation. \\ \therefore \: 0 = - 16 {t}^{2} + 120t \\ \therefore \:16 {t}^{2} - 120t = 0 \\ \therefore \:8t(2t - 15) = 0 \\ \therefore \:8t = 0 \: \: or \: \: (2t - 15) = 0 \\ \therefore \:t = \frac{0}{8} \: or \: t = \frac{15}{2} \\ \therefore \:t = 0 \: or \: t = 7.5 \\ \because \: t = 0 \: is \: not \: possible \\ \huge \purple{ \boxed{ \therefore \: t = 7.5 \: seconds}}$

Thus, the time required for the object to return to its point of departure is 7.5 seconds.

4 0

2 years ago

Mke y the subject of the formula.<br> w=x^2-2yz

charle [14.2K]

Answer:

W = x^2 - 2yz / - w

0 = x^2 - 2yz - w / +2yz

2yz = x^2 - w // 2z

y = (x^2 -w ) / 2z

So correct answer is D

7 0

2 years ago

Use < , > , = , ≤ , ≥ to complete these statements. 1) if x < y , then y___ x, 2) if x > 5 and 5 > y, then x ___

vodomira [7]

Answer:

1) y > x

2) x > 5 > y

3) x ≤ 4 ( or 4 ≥ x )

4) x = y

Step-by-step explanation:

1) 1. y is greater than x

2. so y > x

2) 1. 5 is less than x and more than y

2. we can write this like x > 5 > y

3. you can just squish them together as a shortcut usually: x > 5 and 5 > y --> x > 5 > y

3) 1. x is for at most, we can say this as x is less than or equal to 4

2. this is written as x ≤ 4 or 4 ≥ x

4) 1. x - y = 0 so x and y must be the same value

2. therefore x = y

4 0

2 years ago