Competitive Math Group2 - Grades 4-5
: Question
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Micky Mike lab got new bacterial cells for testing. If each cell is 0.0000044 millimeters in diameter, what is 0.0000044 written in scientific notation?

Micky Mike lab got new bacterial cells for testing. If each cell is 0.0000044 millimeters in diameter, what is 0.0000044 written in scientific notation?

1 Mark(s)

\( 44 × 10^{-6} \)

\( 4.4 × 10^{-6} \)

\( 4.4 × 10^{-4} \)

\( 4400 × 10^{-3} \)

Dan can paint a fence in seven hours. Nate can paint the same fence in nine hours. If they worked together how long would it take them?

Dan can paint a fence in seven hours. Nate can paint the same fence in nine hours. If they worked together how long would it take them?

1 Mark(s)

\( 3.75 \ hours \)

\( 3.94 \ hours \)

\( 4.41 \ hours \)

\( 3.76 \ hours \)

Every green shrub has two trunks. How many trunks do 46 green shrubs have in all ? Every green shrub has two trunks. How many trunks do 46 green shrubs have in all ?

1 Mark(s)

9090

8989

9292

9696

Jake cuts a string of length 8 feet into \(\frac{3}{4}\) length and then cuts it into two equal lengths. What is the length of each piece?

Jake cuts a string of length 8 feet into \(\frac{3}{4}\) length and then cuts it into two equal lengths. What is the length of each piece?

1 Mark(s)

\( 5 \ ft \)

\( 2 \ ft \)

\( 7 \ ft \)

\( 3 \ ft \)

Average of 80 numbers are 42. When 5 more numbers are included, the average of 85 numbers become 45. Find the average of 5 numbers Average of 80 numbers are 42. When 5 more numbers are included, the average of 85 numbers become 45. Find the average of 5 numbers

1 Mark(s)

8282

8989

9393

9898

What is the tens’ digit of the product 2005 × 2003 ?

What is the tens’ digit of the product 2005 × 2003 ?