Can anyone help me with this please.

Mathematics

1 answer:

harkovskaia [24]3 years ago

8 0

Answer:

sketch them into a graph and use the vertical-line trick. If you don't know what this is, you see if two points pass through the same verticaly. If it does than it is NOT a function. If it doesn't it IS a function

If it does theStep-by-step explanation:

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professor190 [17]

Answer:

Step-by-step explanation:

a) Number of girls:

23 + 64 = 87

Percentage:

87/150*100% = 58%

b) Number of students prefer watching TV:

64 + 20 = 84

Percentage:

84/150*100% = 56%

4 0

3 years ago

Read 2 more answers

(3.6x10^-5)÷(1.8x10^2) in standard form

Lerok [7]

Answer:

The standard form of $\left(3.6 \times 10^{-5}\right) \div\left(1.8 \times 10^{2}\right)$ is 0.0000002

Solution:

We have to write $\left(3.6 \times 10^{-5}\right) \div\left(1.8 \times 10^{2}\right)$ in standard form.

$=\frac{3.6 \times 10^{-5}}{1.8 \times 10^{2}}$

By dividing 3.6 by 1.8 we get “2”, hence the above equation becomes,

$=\frac{2 \times 10^{-5}}{10^{2}}$

We know that $\frac{x^{a}}{x^{b}}=x^{a-b}$

Therefore the above equation becomes,

$=2 \times 10^{-5-2}$

$=2 \times 10^{-7}$

since the exponent of 10 is negative , therefore 7 zeros are written on the left hand side of the number.

= 0.0000002

Hence the standard form of $\left(3.6 \times 10^{-5}\right) \div\left(1.8 \times 10^{2}\right)$ is 0.0000002

7 0

4 years ago

Read 2 more answers

The volume of a sphere is 1928π m3 . What is the surface area of the sphere to the nearest tenth?

Rufina [12.5K]

$\bf \textit{volume of a sphere}\\\\
V=\cfrac{4}{3}\pi r^3\qquad \begin{cases}
r=radius\\
------\\
V=1928\pi 
\end{cases}\implies 1928\pi =\cfrac{4}{3}\pi r^3
\\\\\\
1928\pi =\cfrac{4\pi r^3}{3}\implies \cfrac{3\cdot 1928\pi }{4\pi }
=r^3\implies 1446=r^3
\\\\\\
\sqrt[3]{1446}=r\\\\
-------------------------------\\\\
\textit{surface area of a sphere}\\\\
S=4\pi r^2\qquad r=\sqrt[3]{1446}\implies S=4\cdot \pi \cdot \sqrt[3]{1446^2}$