How many strings of eight english letters are there that start with a vowel, if letters cannot be repeated?

We know there are 5 vowels

To make a string of 8 letters the first letter should be a vowel only that means there are 5 choices for first position .

one vowel out of 5 can be chosen in total 5 ways .

Next 7 letters can be chosen out of any 4 vowels and 21 consonants.

there are total 25 choices available and we have to pick any 7

there would be 25P 7 ways to choose them . here P stand for permutation.

so total number of strings we can made are 5* (25 p7) = 5 * 2422728000

Answer : =12113640000

wfirfkfr/jjfi; jn; p/ojkfvlbvmkmgkgkkkgkkg

step-by-step explanation:

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33