>>>BIG BRAINS ONLY How many ways can a supermarket chain select 4 out of 12 possible sites for construction of new supermarkets?​

I am pretty sure it's 495

Step-by-step explanation:

The context of this problem makes me think that the order in which the sites are in does not matter

if that's the case we can solve this using combinations

the combinations formula is as follows:

ACB=

so 12C4=

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

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step-by-step explanation: