Can the sides of a triangle have lengths 3,8, and 10 ?

Yes

Step-by-step explanation:

Yes! All you need to do is cut out different piece of paper in the lengths of the supposed sides. Make one 3 cm, another 8 cm, and another 10 cm.

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.