Answer:
its a 21:45
Step-by-step explanation: it a because 7x3 will equal 21  you got 21 in there. 15 x 3 will equal 45 and you got 45 there so a is your answer.
 
        
             
        
        
        
Answer: A projectile reaches its highest point when its vertical velocity component is zero. 
Step-by-step explanation:
In projectile motion, objects moves in parabolic path. 
Projectile motion is a type of motion in which an object moves in a bilaterally symmetrical, parabolic path. Projection motion happens when the force is applied at the start of the trajectory (where the object follows) which follows an interference which is gravity. Gravity takes over and afterwards the object accelerates downwards. The acceleration is constant so the vertical velocity (Vy) varies linearly. The maximum height of the projectile which is the highest height is reached when the vertical velocity (Vy) is equal to zero. 
After the projectile reaches its maximum height which is its highest point, it begins to drop downwards. 
 
        
             
        
        
        
Answer:
- 13x² - 19x + 23
 - -16x +17
 
Step-by-step explanation:
1 . (4x² - 9x + 16) + (7 + 9x² - 10x)
4x² - 9x + 16 + 7 + 9x² - 10x
13x² - 19x + 23
2 . (-2x + 6) - (14x - 11)
-2x + 6 - 14x + 11
-16x +17
 
        
             
        
        
        
Answer: 5.000
Step-by-step explanation:
The formula to find the standard deviation for binomial distribution is given by :-
, where p is the probability of getting success in each trial and n is the number of trials.
Given : The probability of flipping a coin and noting Heads is = 0.50
The total number of trials = 100
Then , the standard deviation of Heads to be noted will be :-

Hence, the standard deviation of Heads to be noted = 5.000
 
        
             
        
        
        
Answer:
v= 360 
Step-by-step explanation:
v= ( l w h) / 3 
v= ( 12 * 6  * 15 ) / 3 
v = 1080/ 3 
v=360 
( happy to help) :) 
can i get brainliest.