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Romashka-Z-Leto [24]
3 years ago
5

A strand of lights has 50 bulbs and eight of them are burned out what is the ratio of total numbers of the bulbs to the bulbs th

at are burned out A.42:50 B.50:8 C.8:8
Mathematics
1 answer:
Strike441 [17]3 years ago
6 0

Answer:

B.50:8

Step-by-step explanation:

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A 20mg sample of thorium-233 decays to 17mg after 5 min. determine the half life of thorium-233?
snow_tiger [21]
Let r be the decay rate (time in minutes) 17 = 20 e^(5r) 0.85 = e^(5r) ln 0.85 = 5r similarly, ln 0.5 = hr ... where h is the half-life, so dividing the 2 equations, ln 0.85 / ln 0.50 = 5r / hr = 5/h h = 5 ln 0.50 / ln 0.85 h = 21.3 min b) 1/20 = 0.05, so ln 0.85 = 5r ln 0.05 = tr t = 5 ln 0.05 / ln 0.85 t = 92.2 min
3 0
3 years ago
Fidel has a rare coin worth \$550$550dollar sign, 550. Each decade, the coin's value increases by 10\%10%10, percent.
FinnZ [79.3K]

Answer:

Option B - 550(1+0.1)^6

Step-by-step explanation:

Given : Fidel has a rare coin worth $550. Each decade, the coin's value increases by 10%.

To find : Which expression gives the coin's value, 6 decades from now?

Solution :

The given situation represents the exponential function,

y=a(1+r)^n

where, a is the initial value i.e. a=$550

r is the increased rate r=10%

n is the time i.e. n=6

Substitute the value in the formula,

y=550(1+10\%)^6

y=550(1+0.1)^6

Therefore, option B is correct.

8 0
2 years ago
Read 2 more answers
20 people each bring 3 food dishes to an awards banquet. The dishes are shared equally by 180 people at the banquet. How many pe
kherson [118]

Answer:

3 people

Step-by-step explanation:

If 20 people each bring 3 food dishes to an awards banquet, the total amount of food brought will be (20 * 3) = 60foods

If the dishes are shared equally by 180 people at the banquet, then;

60foods = 180 people

1 food = x

Cross multiply

60* x = 180

60x = 180

x =180/60

x = 3

Hence 3 people will share 1 dish

4 0
2 years ago
a trader always 12% discount and sold a fan at a loss of rs 16 if he had sold it at 10% discount he will have gain rupees 20 for
sergejj [24]

Answer:

profit = 30number is the answer of that question answer sapai

3 0
2 years ago
Read 2 more answers
Can someone help me please
tigry1 [53]
Bro okay

0.8($8/book x 6 books) = $38.40
7 0
3 years ago
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