2 years ago

What is 2.53 rounded to the nearest whole number

Mathematics

1 answer:

ella [17]2 years ago

4 0

Answer:

Step-by-step explanation:

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Do these look right?

bezimeni [28]

Answer:

yes it look right like the one you have to do 2x+5=39

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2 years ago

I NEED HELP ASAP THANKSSS<br><br> factor x^2 +9x+20

matrenka [14]

Answer:

(x + 5)(x + 4)

Step-by-step explanation:

$x^{2} +9x+20=(x+5)(x+4)$

6 0

2 years ago

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Multiply and write the solution in scientific notation: 3.2 x 10^2 x 10^5

vlabodo [156]

Answer:

3.2×10²×10⁵=32000000

And the scientific notation is 3.2000000x10⁷

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2 years ago

ABCD is a quadrilateral. Work out the length of BC.

Pani-rosa [81]

The answer is B.C. =8.1cm
The working is on the picture

8 1

3 years ago

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