Question

Work out (5X10^3) x (9X10^7) answer in standard form plz

Answer 1

Answer:

4.5×10¹¹

Answer:

$(5 \times 10 {}^{3} ) \times (9 \times 10 {}^{7} )$

i) use the commutative property to rearrange the terms: a+b = b+a

$(5 \times 9) \times (10 {}^{3} \times {10}^{7} )$

ii) multiply the number in the 1st bracket

$45 \times ( {10}^{3} \times 10 {}^{7} )$

iii) multiply the 2nd bracket by adding their exponents

$45 \times 10 {}^{3 + 7}$

$45 \times 10 {}^{10}$

iv) write the answer in standard form

$4.5 \times 10 {}^{10 + 1}$

$4.5 \times {10}^{11}$

Answer 2

The given equation that should be in the standard form should be like a $4.5\times 10^{11}$.

Equation in standard form:

Since

The equation is $(5\times 10^3) \times (9\times 10^7)$

Now here we use the commutative property

So,

$45 \times (10^3 \times 10^7)\\\\45 \times 10^{10}\\\\4.5 \times 10^{11}$

Here, we multiply the number in the 1st bracket, then add, it and then finally in standard form.

Learn more about an equation here: https://brainly.com/question/24271130