- Lynn has two cats, Polly and Barney. Lynn knows that Polly has a mass of 3 kg.
She estimates that Barney's mass is 3 times Polly's mass.
Work out an estimate of Barney's mass.

9kg

Step-by-step explanation:

Because it is said that Polly's mass is 3kg but, Barney's mass is 3 times more kg than Polly.

So we multiply 3 (Polly's mass) multiplied by 3(cuz it is said three times more). So 3*3 = 9kg

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step-by-step explanation:

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.