The number of  ways that he can make the fruit salad if it must contain watermelon is 35.
<h3>What is Permutation and combination?</h3>
Selection of the one object from the given samples with replacement or without replacement is called as the permutation. The selection of the items from the sample as they are different with each other.
The salad contains water melon, now we have to select 4 more fruits out of 7.
Using combination 
 = n! / r! (n-r)!
 = n! / r! (n-r)!
 = 7!/ 4! (7-4)!
 = 7!/ 4! (7-4)!
       = 7*6*5*4! / 4! * 3*2
       = 35
Hence,  number of ways that he can make the fruit salad if it must contain watermelon is 35.
Learn more about Permutation and combination here:
brainly.com/question/11732255
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773.77*0.5=386.88 hope i helped
        
             
        
        
        
Answer:
14
Step-by-step explanation:
 
        
                    
             
        
        
        
Hi,
To find the volume of cylinder this formula is required.

To get radius you need to divide diameter with 2 like this.

Now just put your values into formula.

You will need 653451.27 cubic centimetres of concrete.
Hope this helps.
r3t40
 
        
        
        
Answer: 600 canned foods was the total.
Step-by-step explanation: We need to find out what‘s 100% of 480. Since 480 canned foods is 80%, we can divide 480 by 8 which gives us 60. Aka 60 canned foods = 10%. Now, we multiply 60 by 10 which gives us 600. Hope this helps!