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
Lapatulllka [165]
3 years ago
10

Select the correct answer. Anna learns in her science class that the human eye blinks an average of 4,200,000 times a year. What

is this number expressed in scientific notation? A. 4.2E6 B. 4.2E-6 C. 42E6 D. 4.2E5 E. 4.2E-5
Mathematics
1 answer:
vivado [14]3 years ago
8 0

Answer:

Step-by-step explanation:

A. 4.2E6 because when putting a number into scientific notation, you would want one number in front of the decimal place and then the trailing numbers would follow. The exponent or E stand for how many numbers are after the decimal, which in this case would be 6.  

4,200,000 → 4.2 x 10^6 which is equal to saying 4.2E6

Tip: If the exponent is negative than the decimal would go in the opposite direction. For example:

4,200,000 → 4.2 x 10^-6 would not equal each other because 4.2 x 10^-6 means 0.000004, six numbers would be behind the decimal.

You might be interested in
In March, there will be two conferences: one for math and one for history. So far, 7 people have signed up for the math conferen
otez555 [7]

Answer:

After 4 days, the number of people attending both conferences be the same.      

Step-by-step explanation:

We are given the following in the question:

Maths conference:

Number of people already signed = 7

Number of people who sign up each day = 2

Thus, the number of people who will sign up for maths conference in x days will be given by the linear function:

 f(x) = 7+2x

History conference:

Number of people already signed =11

Number of people who sign up each day = 1

Thus, the number of people who will sign up for maths conference in x days will be given by the linear function:

 g(x) =11+x

Both conference will have same number of people when

f(x) = g(x)\\\Rightarrow 7 + 2x = 11+x\\\Rightarrow x = 4

Thus, after 4 days, the number of people attending both conferences be the same.

5 0
2 years ago
In which atmosphere layer do humans live most of their lives?
icang [17]

Answer:

Troposphere

Step-by-step explanation:

We humans live in the troposphere, and nearly all weather occurs in this lowest layer. Most clouds appear here, mainly because 99% of the water vapor in the atmosphere is found in the troposphere.

5 0
3 years ago
£110 is divided between Stephen, Bridget & Caroline so that Stephen gets twice as much as Bridget, and Bridget gets three ti
faltersainse [42]

Answer:

I have no clue I really don't have no clue but you 10 divided by 3 and then you could double it by 2 and then after that you could develop by 3 and then that's how much Stephen get

3 0
2 years ago
Write the following percents as both fractions and decimals.
wolverine [178]

Answer:

1/4, 0.25

13/40, 0.325

1/25, 0.04

3/4, 0.75

13/200, 0.065

1 1/4, 1.25

1/8, 0.125

1/500, 0.002

3/400, 0.0075

107/100, 1.07

21/10, 2.10

9/40, 0.225

4 0
3 years ago
The length of six pipes were measured and recorded as follows 2.5m, 6.25m, 4.Om, 2.5m, 3.75m and 6.5m. What is the median length
yaroslaw [1]

Answer:

3.875

Step-by-step explanation:

5 0
2 years ago
Other questions:
  • What is 0.08 10 times as much
    13·1 answer
  • Can you please help me with this?
    13·1 answer
  • A company ordered paper supplies. They bought five times white
    8·1 answer
  • mike, paul, and charlie went fishing. Everyone caught salmon and pike. Mike caught 1 pike and 4 salmon; Charlie caught 5 pike an
    15·1 answer
  • If (w+13)^2=(3w+7)(2w+4), find w^2. Express your answer as a decimal.
    11·1 answer
  • 6(4a^2+11)- 13(3a-2a^2)-28 please help quick!!
    13·2 answers
  • What are rules for transformations and how do they work
    10·1 answer
  • A race car has gas mileage equal to 5.48 kilometers per liter. What is the car's gas mileage in miles per gallon?
    10·1 answer
  • Please help !! <br><br> What is the general equation to the √x?
    14·1 answer
  • The table lists the average monthly cost to workers for family health insurance for various years.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!