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
Dovator [93]
2 years ago
9

There are 23 classes in the fourth grade. Each grade has 21 students. Write a number sentence that will provide a reasonable est

imate for the number of students in the fourth grade. Explain how you found your estimate.
Mathematics
1 answer:
lapo4ka [179]2 years ago
6 0
23 can round to 20 and 21 can also round to 20 so all u do is 20x20=400 so 400 is your estimated answer
You might be interested in
15 POINTS AND WILL MARK BRAINLIEST Help?? Pleasee
Rom4ik [11]

The <em>experimental probability</em> is calculated based on the results of the experiment; since the name Ted was chosen 26 times out of 123, the experimental probability is \boxed{\frac{26}{123}}.

Typically, the <em>theoretical probability </em>assumes that events are chosen randomly; since the name Ted is one of the 6 in the hat, the theoretical probability is \boxed{\frac{1}{6}}.

If we <em>increased</em> the number of names in the hat, we would expect both the experimental and theoretical probability to decrease, since there are now more names to choose from. Similarly, if we <em>decreased</em> the number of names in the hat, the experimental and theoretical probability would increase.

6 0
3 years ago
1. What are the next two terms of the following sequence?
AnnyKZ [126]
All of your marked answers are right
you're very smart (:
6 0
3 years ago
Read 2 more answers
The density of a fluid is given by the empirical equation rho=70.5 exp(8.27 X 10^-7 P) where rho is density (lbm/ft^3) and P is
jasenka [17]

Answer:

(a) The unit of 70.5 is lbm/ft^3 and the unit of 8.27×10^-7 is in^2/lbf

(b) density = 0.1206g/cm^3

(c) rho = 0.1206exp(8.27×10^-7P)

Step-by-step explanation:

(a) The unit of 70.5 is the same as the unit of rho which is lbm/ft^3. The unit of 8.27×10^-7 is the inverse of the unit of P (lbf/in^2) because exp is found of a constant. Therefore, the unit of 8.27×10^-7 is in^2/lbf

(b) P = 9×10^6N/m^2

rho = 70.5exp(8.27×10^-7× 9×10^6) = 70.5exp7.443 = 70.5×1.71 = 120.6kg/m^3

rho = 120.6kg/m^3 × 1000g/1kg × 1m^3/10^6cm^3 = 0.1206g/cm^3

(c) Formula for rho (g/cm^3) as a function of P (N/m^2) is

rho = 0.1206exp(8.27×10^-7P) (the unit of 0.1206 is g/cm^3)

5 0
3 years ago
When 5 is subtracted from the square of a number, the result is 4 times the number. Find the negative solution.
wariber [46]

Answer:

-1

Step-by-step explanation:

You can write it as...

x^{2} -5=4x

Carry the 4x

x^{2} -4x-5=0

Then use the quadratic formula to solve, since you want to find the negative solution, you don't need to find the positive solution, so we will have

(4-\sqrt{16+20}) /2=\frac{4-6}{2}=\frac{-2}{2} =-1

Therefore our answer is -1

8 0
3 years ago
Is (x-2) a factor of f(x) = (4x +13x +10)?
Inessa [10]

Answer:

Step-by-step explanation:

No but it is close.   (4x +13x +10) factors into

(4x + 5)(x + 2)

So (x + 2) is a factor along with (4x + 5)

3 0
3 years ago
Other questions:
  • 10 points question:
    13·1 answer
  • MATH HELP ME ASAP PLS!!!
    10·1 answer
  • Mr. Jamison will stain the deck in his backyard. The deck has an area of 752.4 square feet. If the deck is 33 feet long, how wid
    13·2 answers
  • Abelardo had 3 bags of apples. He gave 2 to his best friend, he gave 3 to his brother, and he fed 1 to his horse. On the way hom
    6·1 answer
  • An architect is recreating the blueprint for a deck with an existing scale factor of 1 in. equals 2 ft​, that is shown. The arch
    15·2 answers
  • A particular fruit's weights are normally distributed, with a mean of 344 grams and a standard deviation of 10 grams. If you pic
    13·1 answer
  • Giving out the 15 points help please number 2.
    8·1 answer
  • What is graph theory? Math
    14·2 answers
  • Raymond’s gas tank is 1/3 full. After he buys 11 gallons of gas, it is 5/6 full. How many gallons can Raymond’s tank hold?
    9·1 answer
  • The __________ is a measure of dispersion that is used in constructing confidence intervals for the mean and in evaluating resea
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!