Jack want to buy a toy that costs $15.99. if he has 30% of the total cost saved, how much has he saved so far?

Amount saved by Jack = $4.8

Step-by-step explanation:

Cost of the toy Jack wants to buy = $15.99

Percentage of total cost Jack saves = 30%

We need to find the amount Jacks saves on the total cost.

In order to find the amount saved by Jack on the total cost, we will find 30% of the total cost.

Amount saved by Jack =

⇒

⇒     [representing percent as fractions]

⇒

⇒

So, amount saved by Jack = $4.8 (Answer)

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this