Hiro picks up four digit cards. he says: I can make a multiple of 10 with these cards.
I can also make a number that rounds to 5300
and a number where thd digit 8 is worth 800.

Q. 1) What could his cards be?

Q. 2) Write the number you think Hiro is talking about.
"The multiple of 10 is .
The number that rounds to 5300 is .
The number where 8 is worth 800 is

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Which one is true about the hexagons ?