3 years ago

Round the fraction to the nearest whole number. 2 9

Mathematics

2 answers:

alexira [117]3 years ago

6 0

Answer:

Step-by-step explanation:

ratelena [41]3 years ago

4 0

Answer:

Step-by-step explanation:

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The second hand of a clock makes a full revolution once every minute. What is its angle of rotation after 20 seconds? After 45 s

nikklg [1K]

360/60 = 6

6 degrees every second

6*20 = 120 degrees

120 degrees after 20 seconds

6 * 45 = 270

270 degrees after 45 seconds

Hope I helped!

Let me know if you need anything else!

~ Zoe

7 0

3 years ago

Simplify (Are all division) 2+4i 3i 3+2i 4+i 2i^11

Alla [95]

$We\ know:\ i=\sqrt{-1}\to i^2=-1$

$\dfrac{2+4i}{3i}=\dfrac{2+4i}{3i}\cdot\dfrac{3i}{3i}=\dfrac{6i+12i^2}{9i^2}=\dfrac{6i+12(-1)}{9(-1)}\\\\=\dfrac{6i-12}{-9}=\dfrac{2i-4}{-3}=\dfrac{4}{3}-\dfrac{2}{3}i$

$\dfrac{3+2i}{4+i}=\dfrac{3+2i}{4+i}\cdot\dfrac{4-i}{4-i}=\dfrac{(3+2i)(4-i)}{4^2-i^2}\\\\=\dfrac{(3)(4)+(3)(-i)+(2i)(4)+(2i)(-i)}{16-(-1)}=\dfrac{12-3i+8i-2i^2}{16+1}\\\\=\dfrac{12+5i-2(-1)}{17}=\dfrac{12+5i+2}{17}=\dfrac{14+5i}{17}=\dfrac{14}{17}+\dfrac{5}{17}i$

$2i^{11}=2i^{10+1}=2i^{10}i^1=2i^{2\cdot5}i=2i(i^2)^5=2i(-1)^5=2i(-1)=-2i$

$Used:\ (a+b)(a-b)=a^2-b^2$

6 0

3 years ago

Can someone solve this

Leto [7]

Answer:

76 inches

Step-by-step explanation:

20 + 18 = 38

38 x 2 = 76

3 0

2 years ago

Read 2 more answers

If the simple interest on $6,000 for 4 years is $1,920, then what is the interest rate?

Vsevolod [243]

Answer:

8 percent

Step-by-step explanation:

Since the formula for interest rate is the original money, the amount of years, and the inetrest rate multiplied together, we could plug it into an equation. 6000 times 4 times the ineterest rate is equal to 1920. 6000 times 4 is 24000. 1920 divided by 24000 is equal to 0.08 or 8 percent.

6 0

3 years ago

What is the answer pls explain

natita [175]

Answer:

no pic?

Step-by-step explanation:

4 0

2 years ago