sister ,we can use the law of sines. since we have the angle of elevation and assume the wall makes a right angle with the ground, our angle opposite the ground is 180-[90+23=67
The number of permutations of the 25 letters taken 2 at a time (with repetitions) is: The number of permutations of the 9 digits taken 4 at a time (with repetitions) is: Each permutation of letters can be taken with each permutation of digits, therefore the total number of possible passwords is:
The order that the pitcher threw is F, C, F, F, C, C, F, F, F then the next five pitches are C, C, C, C, F, F, F, F, F assuming the pitcher maintains this order