1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marta_Voda [28]
2 years ago
15

Which is the more reasonable measurement of the distance between the tracks on a DVD: 7.4 ⋅ 10−4 mm or 7.4 ⋅ 104 mm? Justify you

r answer.
Mathematics
2 answers:
EleoNora [17]2 years ago
8 0

Answer:

A- 7.4 ⋅ 10−4 mm

Step-by-step explanation:

Well, to solve this problem, we must convert the number and / or the units in a more imaginable one.

We are given two choices:

a. 7.4 x 10^-4 mm

b. 7.4 x 10^4 mm

Converting the units and numbers into meters and general form, respectively. (What is meant by general form is not to write it in scientific notation).

a. 7.4 x 10^-4 mm (1 m / 1000 mm) = 0.00000074 m

b. 7.4 x 10^4 mm (1 m / 1000 mm) = 74 m

Now comparing the two values above, what do you think is the distance between the tracks on a DVD? Definitely NOT 74 m or else the DVD is extremely big. Therefore the correct is the smaller one.

DiKsa [7]2 years ago
3 0

Answer:

desdrgtfyguhijokhbgftrdszxfcghbjklmmjhugtfdszxbnm

Step-by-step explanation:

uhgfdfcyhuihygtfy78ytrer68trdxtygnbjmn b

You might be interested in
A rope is 225 centimeters long.
n200080 [17]

Answer:

This is impossible, unless you meant centimeters. If you did, then the answer would be 113.

Step-by-step explanation:

225 - 112 = 113.

8 0
3 years ago
The mean time it takes to walk to the bus stop is 8 minutes (with a standard deviation of 2 minutes) and the mean time it takes
11111nata11111 [884]
(a) Average time to get to school
Average time (minutes) = Summation of the two means = mean time to walk to bus stop + mean time for the bust to get to school = 8+20 = 28 minutes

(b) Standard deviation of the whole trip to school
Standard deviation for the whole trip = Sqrt (Summation of variances)

Variance = Standard deviation ^2
Therefore,
Standard deviation for the whole trip = Sqrt (2^2+4^2) = Sqrt (20) = 4.47 minutes

(c) Probability that it will take more than 30 minutes to get to school
P(x>30) = 1-P(x=30)
Z(x=30) = (mean-30)/SD = (28-30)/4.47 ≈ -0.45
Now, P(x=30) = P(Z=-0.45) = 0.3264
Therefore,
P(X>30) = 1-P(X=30) = 1-0.3264 = 0.6736 = 67.36%

With actual average time to walk to the bus stop being 10 minutes;

(d) Average time to get to school
Actual average time to get to school = 10+20 = 30 minutes

(e) Standard deviation to get to school
Actual standard deviation = Previous standard deviation = 4.47 minutes. This is due to the fact that there are no changes with individual standard deviations.

(f) Probability that it will take more than 30 minutes to get to school
Z(x=30) = (mean - 30)/Sd = (30-30)/4.47 = 0/4.47 = 0

From Z table, P(x=30) = 0.5
And therefore, P(x>30) = 1- P(X=30) = 1- P(Z=0.0) = 1-0.5 = 0.5 = 50%
8 0
3 years ago
What is the value of 1 3/4 in decimal form
Luba_88 [7]
The answer would be, 1.75 because 3/4 of 1 is 75% pulse you spreading have a whole, so 1.75.
3 0
3 years ago
Read 2 more answers
Helppp pleaseee if you can !!! if you can’t see the pic don’t bother answering
tester [92]

Answer:

D. $ 650

hope this is correct if its wrong I'm sorry

hope this helps you☺️☺️

4 0
3 years ago
Sue made a batch of snack mix for the party. She combined 12 ounces of mixed nuts, 20 ounces of cereal, and 8 ounces of pretzels
Levart [38]

Answer:

The pretzels are 20% of the total weight of the snack.

Step-by-step explanation:

Total weight 12 + 20 + 8 = 40

So 8 / 40 = 20%

6 0
3 years ago
Other questions:
  • Can you help me with perpendicular lines and parallel lines?
    10·1 answer
  • A SQUARE PYRAMID has a base length of 8in. The height of the pyramid is 2.4in. What is the SQUARE AREA of the pyramid? ***USE FO
    13·1 answer
  • 60% as a fraction, mixed number, or whole number in simplest form
    14·2 answers
  • Can any one help me
    8·1 answer
  • Is the number 8.25 a rational number or an irrational number
    10·2 answers
  • When Sandy and Allen's mother decorates the house for a holiday by herself, it takes her 5 hours. When both Sandy and Allen help
    11·2 answers
  • What is this number in expanded form?
    12·1 answer
  • Mary is buying tickets for a movie.
    9·1 answer
  • Write the numeral to represent four hundred and eight thousand and sixty-four
    11·2 answers
  • IF NR = 8 ft, what is the length of arc NMP. Round to the nearest tenth.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!