Find a. b. if a =10i+4j and b = 3i+4j

10i+4j times 3i+4j=

30i+16j

(30,16)

Step-by-step explanation:

Option (c) is correct.

The dot product of given vectors and is 46.

Step-by-step explanation:

Given : The vectors   and

We have to find the dot product of given vectors a and b

Consider the given vectors and

We have

Thus, The dot product of given vectors and is 46.

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.