3 years ago

What does 4+9n mean

Mathematics

1 answer:

vlabodo [156]3 years ago

4 0

You have to add 4 and 9 then drop your variable

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Log_2(log_5 x) =3 show steps

alexandr1967 [171]

Use the definition of a logarithm
If Log(x) = y ; then b^y = x

$Log_{2} (Log_{5} (x)) = 3 \\ \\ 
2^{3} = Log_{5} (x) 
\\ \\ 8 = Log_{5} (x) 
\\ \\ x = 5^{8} 
\\ \\ x = 390,625$

3 0

3 years ago

If a spherical ball is enlarged so that its surface area is 9 times greater than its original surface area, then the original ra

luda_lava [24]

The surface area of a sphere is $A = 4 \pi r^{2}$ and if the original S.A was is enlarged to have it 9 times greater, the radius would be multiplied by 3 or roughly 2.99626 rounded off to 3.0.

For example, let us assign values.
Let A=90

A= 90*9 = 810

$90 = 4 \pi r^{2} 

$ and $810 = 4 \pi r ^{2}$

the first r is 2.68 and the second r is 8.03

then, $\frac{8.03}{2.68} = 2.99626$ or rounded off to 3.