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3 years ago

Practice multiplying numbers by powers of 10.

Mathematics

1 answer:

Juliette [100K]3 years ago

8 0

Answer:

Multiply (400 + 20 + 3) x 10000

Add 4 zeros to the end of 423

Step-by-step explanation:

423 x 10,000 = Adding the amount of zero’s in 10000 to 423

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there are 16 sixth graders, 11 seventh graders, and 9 eighth graders in a gym class. the gym teacher randomly selects one studen

Olin [163]

Answer:

34 total students.

25 are not 7th graders

27/35

7 0

3 years ago

What is 4 1/3 minus 2 3/4

valentinak56 [21]

What you are asking is
$4 \frac{1}{3} -2 \frac{3}{4}$
we need to make the fractions improper now,
$\frac{13}{3} - \frac{11}{4}$
now we need common denominators:
$\frac{52}{12} - \frac{33}{12}$
we get
$\frac{19}{12}$
OR
$1 \frac{7}{12}$

5 0

3 years ago

A set of tires is designed to last 6 years, with a standard deviation of 2 years. What is the probability that a tire will last

evablogger [386]

Answer:

16%.

Step-by-step explanation:

We may assume that the times are normally distributed.

We first find the z-score which is the (value - mean) / standard deviation.

z-score = (4 - 6)/2 = -1.

Looking up the value for -1 on a z-score normal distribution table we find that -1 gives us 0.1587 - that is 16%.

3 0

3 years ago

Read 2 more answers

Find c, yenvelope(x,t), and ycarrier(x,t). express your answer in terms of a, k1, k2, x, t, ω1, and ω2. separate the three parts

steposvetlana [31]

Answer:

$C,Y_{envelope}(x,t), Y_{carrier}(x,t)=2A, \cos ((k_1-k_2)x/2-(\omega_1 -\omega_2)t / 2 ) , \sin ((k_1+k_2)x / 2 - (\omega_1 +\omega_2)t / 2 )$

Step-by-step explanation:

Given

$Y_1(x,t)=A \sin(K_1x- \omega _1 t)\\\\Y_2(x,t)=A \sin(K_2x- \omega _2 t)$

using a trigonometrical identity

sin p + sin q = 2 sin ( p+q/2) cos ( p-q/2)

and here the condition is

the choice is in between sinax and cosax

where a > b

so we get using above equation

$C,Y_{envelope}(x,t), Y_{carrier}(x,t)=2A, \cos ((k_1-k_2)x/2-(\omega_1 -\omega_2)t / 2 ) , \sin ((k_1+k_2)x / 2 - (\omega_1 +\omega_2)t / 2 )$

4 0

4 years ago

What is the main function of the nucleolus. Explain it like your explaining it to a five year old. Make it easy to understand

Luden [163]

This isn't math but...

A nucleolus<span> (plural: </span>nucleoli<span>) is the part of a eukaryote cell where ribosomes are made.
</span>
Ribosomes are composed of protein and RNA, and is the site of protein synthesis.

4 0

4 years ago