Answer:
y" - 8y' + 15y = 0
2nd order Homogeneous DE.
Solving Quadratically
k² - 8k + 15 = 0
k= 5 or k= 3.
Two real and Unequal roots.
y= Ae^5x + Be^3x.
Answer:
Step-by-step explanation:
She writes 180words in 5min
In 1 min she writes = 180/5 words
= 36 words
In 1hr = 60min she will write = 36×60words
= 2160words
: she will write 2160words in 1hr
Answer:
Step-by-step explanation:

Answer:
Rational, integers, whole, natural, real
Step-by-step explanation:
109 is rational because it can be expressed as the ratio of two integers: 109:1
109 is integer because it can be written with no fractions
109 is a whole number because it has no decimals
109 is natural because it is an integer greater than 0
Hope this helps! ;)