Mathematics: Plz help me ill mark brainliest i promise

Plz help me ill mark brainliest i promise - id14367241, GhostElite6383

reganleigh00

18.09.2021

calculate:5• -4

your answer is -20

Step-by-step explanation:

5• -4

5×(-4)

=-20

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jazmine8194

31.01.2023

5 × 10^43

Step-by-step explanation:

we know that

To find out how many times the number 10^55 is greater than the number 2 × 10^11, divide the number 10^55 by the number 2 × 10^11

Remember that

To divide two numbers in scientific notation, divide their coefficients and subtract their exponents

$\frac{10^{55}}{2*10^{11}}=(\frac{1}{2})(\frac{10^{55}}{10^{11}})=0.5*10^{(55-11)}=0.5*10^{44}$

we have that

$0.5=5*10^{-1}$

substitute

$(5*10^{-1})(10^{44})=5*10^{(44-1)}=5*10^{43}$

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