5^-2 can be written as

The value of 3^5÷ 3^-8 is

The usual form of 2.08 x 10^-5 is

Which of the following is the standard form of 0.00001275?

Which of the following is equal to [100 - 99\(°\)] \(\times\) 100?

Find the multiplicative inverse of the following:
10^-100

Simplify and write in exponential form.
\(3^{2}\times 3^{-5}\times 3^{6}\)

Find the value of m for which \(5^{m}\div 5^{-3}=5^{5}\)

Write each of the following in standard form: 0.00001278

Express the following numbers in usual form: 7.54 \(\times\) 10^-4

Find the standard form of the number 0.0005+0.0085.

Express \(\frac{1.5\times 10^{6}}{2.5\times 10^{4}}\) In the standard form.

Compare the size of a red blood cell which is 0.000007 m to that of a plant cell which is 0.0000129 m.

Simplify: \({ \left[ { \left( \frac { -4 }{ 5 } \right) }^{ -2 } \right] }^{ 2 }\)

Express 2.0001 \(\times\) 10⁹  in usual form.

Express the product of 1.3x10⁴ and 3.4x10^-2 in the standard form.

Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression 3^-t.
(a) What fraction of substance remains after 7 half-lives?
(b) After how many half-lives, will the fraction be \(\frac{1}{243}\) of the original?

Express the following numbers in standard form 5463

Find the value of x, if 2^x÷ 2³ = 2^-1