How many numbers can you make between 0-99 using exactly four 4s and the operations $$ +,−,×,÷?

Juliana says that she can use the patterns of equivalent ratios in the multiplication table below to write an infinite number of ratios that are equivalent to 6: 10. which statement explains whether juliana is correct? she is correct because she can multiply 6 and 10 by any number to form an equivalent ratio. she is correct because 6: 10 can be written as 1: 2 and there are an infinite number of ratios for 1: 2. she is not correct because the multiplication table does not include multiples of 10. she is not correct because 6: 10 is equivalent to 3: 5 and there are only 9 ratios in the multiplication table that are equivalent to 3: 5.

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6