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
Darya [45]
2 years ago
12

Omar broke a cell sample into 8 batches, each

Mathematics
1 answer:
Nady [450]2 years ago
7 0

Step-by-step explanation:

we have 8 equally "heavy" batches.

one weighs 3.9 × 10^-10 g

so, the total sample then weighed

8 × 3.9 × 10^-10 = 31.2 × 10^-10 = 3.12 × 10^-9 g

You might be interested in
49 is 200% of what number
finlep [7]
Idk howbto help u it could be 67 for all i know
4 0
3 years ago
Put these numbers in order from least to greatest. 0.57 5.07 50.7 57 75 ​
nordsb [41]

Answer:

It's basically already in order: 0.57, 5.07, 50.7, 57, 75

Step-by-step explanation:

Hope it helps!      :3

Plz mark as brainliest!

5 0
3 years ago
Read 2 more answers
PLZ HELP ASAP 20 POINTS WILL MARK BRAINLIEST THANK YOU
Ganezh [65]
55 dog
20 hamster
25 other
7 0
3 years ago
Read 2 more answers
What is 240,700 written in scientific notation?
kodGreya [7K]

Answer:

It is the 2nd option

Step-by-step explanation:

4 0
3 years ago
a regular rectangular pyramid has a base and lateral faces that are congruent equilateral triangles. it has a lateral surface ar
Margarita [4]
A pyramid is regular if its base is a regular polygon, that is a polygon with equal sides and angle measures.
(and the lateral edges of the pyramid are also equal to each other)

Thus a regular rectangular pyramid is a regular pyramid with a square base, of side length say x.

The lateral faces are equilateral triangles of side length x.

The lateral surface area is 72 cm^2, thus the area of one face is 72/4=36/2=18  cm^2.

now we need to find x. Consider the picture attached, showing one lateral face of the pyramid.

by the Pythagorean theorem: 

h= \sqrt{ x^{2} - (x/2)^{2}}= \sqrt{ x^{2}- x^{2}/4}= \sqrt{3x^2/4}= \frac{ \sqrt{3} }{2}x

thus, 

Area_{triangle}= \frac{1}{2}\cdot base \cdot height\\\\18= \frac{1}{2}\cdot x \cdot \frac{ \sqrt{3} }{2}x\\\\ \frac{18 \cdot 4}{ \sqrt{3}}=x^2

thus:

x^2 =\frac{18 \cdot 4}{ \sqrt{3}}= \frac{18 \cdot 4 \cdot\  \sqrt{3} }{3}=24 \sqrt{3}       (cm^2)

but x^{2} is exactly the base area, since the base is a square of sidelength = x cm.


So, the total surface area = base area + lateral area =  24 \sqrt{3}+72   cm^2


Answer: 24 \sqrt{3}+72   cm^2

4 0
3 years ago
Other questions:
  • How do you solve for x?
    14·1 answer
  • Find the volume of a rectangular prism with the following dimensions. length: 4 yd width: 5 ft height: 11 ft volume = ft 3
    10·1 answer
  • Can someone please help me with this?
    7·1 answer
  • Simplify x^3 /x<br><br><br><br> Help
    10·1 answer
  • Which of the following equations represents an account that will double after approximately 6 years? y = 1(1.50)^x y = 2(1.17)^x
    11·2 answers
  • What is the m/__m <br><br> put only the number do not label your answer
    11·1 answer
  • Lynn has a watering can that holds 8 cups of water. How many cups of water will 13 plants get
    13·1 answer
  • A football team receives a 5-yard penalty on one play and a 10-yard penalty on the next. Write a number sentence to represent th
    11·1 answer
  • To support a local senior citizens center, a student club sent a flyer home to the n students in the school. The flyer said, "Pl
    11·1 answer
  • How do I do this question?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!