QN. Calculate the volume of a sphere of radius 7cm with a mass of 2100g

Mathematics

1 answer:

Galina-37 [17]3 years ago

3 0

Answer:

V≈1436.76cm³

Step-by-step explanation:

check image to see how to solve it

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Round 325.49 to the nearest tens place

VLD [36.1K]

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3 years ago

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Using the sine rule, calculate the length y. Give your answer to 2 s.f.

Tpy6a [65]

Answer:

y = 9.84 mm

Step-by-step explanation:

Law of sine:

$\sf \boxed{\bf \dfrac{a}{Sin \ A}=\dfrac{b}{Sin \ B}= \dfrac{c}{Sin \ C}}$

a = y

A = 31°

b = 17 mm

B = 117°

$\sf \dfrac{y}{Sin \ 31^\circ}=\dfrac{17}{Sin \ 117^\circ}\\\\$

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2 years ago

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kondor19780726 [428]

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Order of operations:
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4 years ago

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Flura [38]

Answer:

2.0 seconds

Step-by-step explanation:

Given quadratic functions:

$\begin{cases}y=-7x^2+26x+3\\y=-6x^2 +23x+5\end{cases}$

To find the time, in seconds, that the balloons collided at the highest point, substitute one equation into the other equation and rearrange to equal zero:

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