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marshall27 [118]
4 years ago
8

one each day dariene write in her personal diary and records whether the sun isshining or not when she looked back tough her dia

ry she found that over a period 600 days the sun was shining 60% of the time she kept recording for another 200 days and then found that the total number of sunny days dropped to 50% how many of the final 200 days were sunny days
Mathematics
2 answers:
Svetradugi [14.3K]4 years ago
7 0
Im guessing ten or some sort of factor of ten
Katyanochek1 [597]4 years ago
6 0
The answer is 40 days I think
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A train left for Houston, and 7 hours later, a car traveling 62 mph tried catching up to the train. After 4 hours, the car caugh
lana [24]

Answer: 22.55 mph

Step-by-step explanation:

Let the speed of the train be n

4 × 62 = 248 which is the distance travelled by the car in 4 hours and the train travelled in 11 hours

11 × n = 248

11n = 248

n = 248/11

n = 22.55mph

5 0
4 years ago
1+cos2A /1-cos2A=cotA.cotA​
Allisa [31]

Answer:

See Explanation

Step-by-step explanation:

formulae \: to \: be \: used :  \\  \cos 2 \theta = 2 { \cos}^{2}  \theta - 1 \\ and \\ \cos 2 \theta = 1 - 2 { \cos}^{2}  \theta  \\  \\ now \: let \: us \: prove \: the \: given \: trigonometrical \:  \\ identity. \\  \\  \frac{1 +  \cos2A}{1  -   \cos2A}  = \cot \: A. \cot \: A \\ LHS =  \frac{1 +  \cos2A}{1  -   \cos2A}  \\  \\  =  \frac{1 +2 { \cos}^{2}   A- 1 }{1 - (1  - 2 { \sin}^{2}   A)}  \\  \\ =  \frac{1 +2 { \cos}^{2}   A- 1 }{1 - 1   + 2 { \sin}^{2}   A}  \\  \\ =  \frac{2 { \cos}^{2}   A }{2 { \sin}^{2}   A}  \\  \\ =  \frac{{ \cos}^{2}   A }{ { \sin}^{2}   A}  \\  \\  =  { \cot}^{2} A \\  \\  =  { \cot} A .{ \cot} A \\  \\  = RHS \\  \\ hence \: proved.

6 0
3 years ago
Write a story for this graph. ( Use the outline plz)
Katyanochek1 [597]

Answer:

Jack is evil.

Step-by-step explanation:

Jack wasn't very smart, one-day jack made a science experiment to increase the temperature of frogs 2 fold every week starting from 2 degrees Celcius, the graph shows how much he cooked the poor frog in the weeks that sadly, followed.

(in case you don't know fold just means multiplied by that much so 20k$ going 10 fold is 200k$)

3 0
3 years ago
Does multiplying by 1/3 and dividing but 3 produce the same answer
Anuta_ua [19.1K]

Answer:

no

Step-by-step explanation:

it makes a new answer

5 0
4 years ago
Read 2 more answers
Quinn correctly answered 72 questions on a test, getting a score of 80%. How many questions were on the test?
vesna_86 [32]
93 hope this helps thank u
8 0
3 years ago
Read 2 more answers
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