Answer:
Here's what I get
Step-by-step explanation:
1. Wavelengths
2. Identity of unknown
Don't know. You haven't told us its flame colour.
3. Light filters
You could probably filter lithium light. It is almost pure red.
The other elements emit light of mixed colours. It would be difficult to filter them with filters of a single wavelength.
4. Fireworks chemicals
For a red explosion followed by a green one, the engineer should use LiCl and CuCl₂.
Answer:
The answer is the option D
Step-by-step explanation:
we know that
The formula to calculate the surface area of a cylinder is equal to
where
A is the surface area of the cylinder
r is the radius of the cylinder
h is the height of the cylinder
Isolate the variable h
Divide by both sides
Subtract both sides
Basically, you just have to distribute and then add. Let's do that:
30.
Combine like terms (and this is your answer):
31. Same thing (except convert 1 and 1/5 to an improper fraction):
Hope this helped!
Answer:
75,323,600
10.4%
292
4471
77
$2.54
Step-by-step explanation:
1. Voters in 2020 =
1.292 x 58,300,000 = 75,323,600
2.( number of turkey sandwich / total number of sandwich ) x 100
(51/491) x 100 = 10.4%
3. percent of chemistry majors = (number of chemistry majors / total students that graduated) x 100
0.017 = number of chemistry majors / 17,190
Multiply both sides of the equation by 17,190
17,190 x 0.017 = 292
4. number of trees in 4 square miles = (4 x 1006) / 0.9 = 4471
5. Percent from Canada = percentage of people from Canada x total number of people attending the conference
0.089 x 870 = 77
6. Average price = total cost of items / total quantity sold
[(24 x 3.50) + (61 x0.25) + (18 x 9)] / 103 = 2.54
Answer:
850
Step-by-step explanation:
919- 69 = 850