The answer is 56 ft
The perimeter of the rectangle with width w and length l is:
P = 2w + 2l
We know:
w = 7 ft
l = 3w = 3 * 7 = 21 ft
P = 2w + 2l
P = 2 * 7 + 2 * 21
P = 14 + 42
P = 56 ft
Answer:
C
Step-by-step explanation:
To find the x- intercept let y = 0, hence
cos() = 0
= (0 ) =
multiply both sides by 2
x = π ← x- intercept
The slope is -2. The y-intercept is (0,1).
Answer:
You have a chance of getting any of those.
Step-by-step explanation:
If you were to flip the first coin, and it would be either heads or tails 50% chance.
If you flipped the second coin, without cancelling the first, it would be 25% chance
If you flipped the third coin, without cancelling the first it would be 12.5% chance
(this is all for heads)
Correct question:
Which reaction describes a beta emission? 2659Fe→ 2759Co + −10e, 88226Ra→ 86222Rn + 24He, 94239Pu + 24He→ 96242Cm + 01n, 54118Xe→ 53118I + +10e
Answer:
2659Fe→ 2759Co + 1e
Step-by-step explanation:
General equation for beta decay is given as;
where;
A is the atomic mass of the element
z is atomic number of the element
X is the parent atom
Y is the daughter element
β is beta emission
In beta emission, there is loss of one electron and zero proton, the will cause the daughter element to gain on electron in order to balance the reaction.
Based on beta decay equation above, we select the reaction that describes beta emission.
2659Fe→ 2759Co + 1e
Here;
A = 59
z = 26
z + 1 = 27