When multiplying two decimal numbers, you first ignore the decimals, find the product, then count the number of decimal places that need to be in the answer by taking the sum of the original decimal places. Why exactly does this work?

Kendra Hudson
2022-09-11
Answered

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asked 2021-03-09

Calculate net price factor and net price.

Dollars list price$-435.20\mathrm{\$}}$

Trade discount rate$-26\mathrm{\%},15\mathrm{\%},5\mathrm{\%}.$

Dollars list price

Trade discount rate

asked 2020-10-25

Find the sum of the given vectors

$50N\mathrm{\angle}{320}^{\circ}+170N\mathrm{\angle}{150}^{\circ}$

$Rx=?$

$Ry=?$

$R=?$

$\theta =?$

asked 2022-09-11

1) For any natural $i,\text{}f(i)\le (i-1)$ .

2) If i divides a number of the form ${b}^{n-1}+1$ or ${b}^{n}-1$ (for applicable n) then $f(i)\le n$ (I believe this to be an equality if n is minimal).

3) If $i={j}_{1}\times {j}_{2}$ with ${j}_{1}$ and ${j}_{2}$ coprime, then $f(i)\le \text{lcm}(f({j}_{1}),\text{}f({j}_{2}))$ .

2) If i divides a number of the form ${b}^{n-1}+1$ or ${b}^{n}-1$ (for applicable n) then $f(i)\le n$ (I believe this to be an equality if n is minimal).

3) If $i={j}_{1}\times {j}_{2}$ with ${j}_{1}$ and ${j}_{2}$ coprime, then $f(i)\le \text{lcm}(f({j}_{1}),\text{}f({j}_{2}))$ .

asked 2021-02-09

To find:

The exact circumference of the circle with radius 7 meters and approximate the circumference.

The exact circumference of the circle with radius 7 meters and approximate the circumference.

asked 2021-09-16

Adding decimals. $10,258.45 + $987.35 + $6,937.30

asked 2021-02-01

Among a student group 49% use Google Chrome, 20% Internet Explorer, 10% Firefox, 5% Mozilla, and the latter use Safari. What is the probability that you need to pick 7 students to find 2 students using Google Chrome? Report answer to 3 decimals.

asked 2021-02-06

Find the sum of the given vectors

$700N\mathrm{\angle}{320}^{\circ}+400N\mathrm{\angle}{20}^{\circ}$

$Rx=?$

$Ry=?$

$R=?$

$\theta =?$