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
hoa [83]
2 years ago
7

Please help it would be much appreciated

Mathematics
1 answer:
kari74 [83]2 years ago
7 0

Answer:

calcium =1x40=40

chlorine=2x35=70

40+70=110

ca=40/110×100=36.36

when we approximate it become 36.4

thanks

You might be interested in
A coordinator will select 6 songs from a list of 9 songs to compose an event's musical entertainment lineup. How many different
g100num [7]

Answer:

84 different lineups are possible

Step-by-step explanation:

The order in which the songs are chosen is not important. So we use the combinations formula to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

In this question:

6 musics from a set of 9. So

C_{9,6} = \frac{9!}{6!(9-6)!} = 84

84 different lineups are possible

4 0
3 years ago
A right-angled triangle has sides which are 5 inches and 12 inches. How long is the triangle's hypotenuse?
Andrew [12]

Answer:

13 inches

Step-by-step explanation:

Use the Pythagorean Theorem:

a^2 + b^2 = c^2

(5)^2 + (12)^2 = c^2

c^2 = 169 in^2

c = 13 inches

4 0
2 years ago
Can y’all help me again
Alexxx [7]
Hello! To find the formula for Celsius to Fahrenheit, we just basically find the inverses of what's in the problem. The multiplicative inverse of 5/9 is 9/5. The opposite of f - 32 is c + 32. The formula is 9/5c + 32. Even on the internet, it confirms that the formula is 9/5 and then add 32. The answer is B.
4 0
3 years ago
The price of an item has risen to $217 today. Yesterday it was $140. Find the percentage increase.
tiny-mole [99]

Answer: $77

Step-by-step explanation: 77 is the correct answer because the price increased by 77 because 77 is the difference between the two, and how i got 77 was to subtract 140 ( the earlier price) from 217 ( the price that it changed to), i hope you found this helpful...

5 0
2 years ago
PLEASE HELP ME 40 POINTS
Serjik [45]

Answer:

see below

Step-by-step explanation:

A: radius of 12 ft

    Changing to meter

 12 ft * .305 m/ ft =3.66 meter

The radius is 3.66 meters

The diameter is twice the radius = 2*3.66 =7.32 meters

The circumference is

C = pi*d = 3.14 * 7.32 =22.9848 = 22.98 meters

B diameter is 7.5 meters

Pool B has a bigger diameter

C = pi * d = 3.14 * 7.5m = 23.55 meters

The difference is .57 meters

7 0
3 years ago
Read 2 more answers
Other questions:
  • Please help asap, it would mean a lot
    6·1 answer
  • The price of a computer was decreased by 30% to £147. What was the price before the decrease?
    5·1 answer
  • Hey:) can you please help me posted picture of question
    15·1 answer
  • The Hamburger Joint lowered their prices and their sales increased from 1000 hamburgers a week to 2500 hamburgers a week. What i
    9·2 answers
  • A physical property of a solid use to describe its surface
    15·1 answer
  • The point (5, -2) is rotated 90° about the origin. Its image is:
    15·1 answer
  • A student is conducting a research project that involves using a survey. The survey asks subjects about their political affiliat
    7·1 answer
  • You have to say the time and the clocks are inverted btw
    7·2 answers
  • IM REALLY STUCK WITH GEOMETRY CAN SOMEONE PLEASE HELP? ON MY PAGE THERE IS 2 QUESTIONS! P L E A S E HELP
    15·1 answer
  • A beach volleyball court is 9 meters wide and 18 meters long. The rope used
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!