1) round 168,356 to the nearest ten thousand.2) round 446,221 to the nearest ten3) round 45,122 to the nearest ten thousand.4) round 7,782 to the nearest hundred.

1) 170,000

2) 446,220

3) 50,000

4)  7,800

Step-by-step explanation:

When we round a number to the nearest hundred then we check the digit at tens place,

If the digit is less than 5 then the number is rounded to previous thousand and if it is 5 more than 5 it is rounded to the next thousand,

While, in the case of rounding nearest ten and ten thousand we check the digit at ones place and thousand place respectively.

1)168,356 to the nearest ten thousand is 170,000  ( ∵ thousand place digit = 8 > 5 )

2) 446,221 to the nearest ten is 446,220 ( ∵ ones place digit = 1 < 5 )

3) 45,122 to the nearest ten thousand is 50,000 ( ∵ thousand place digit = 5 ≥ 5 )

4) 7,782 to the nearest hundred is 7,800 ( ∵ tens place digit = 8 > 5 )

14

step-by-step explanation:

14 x 3 = 42

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it