It is estimated that a certain beach has $5 \times 10 ^ { 19 }$ grains of sand. The beach has an area of $1.3$ million square feet. How many grains of sand are there on average per square foot of sand? Round to 3 significant digits.
A) $6.50 \times 10 ^ { 25 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

B) $3.85 \times 10 ^ { 13 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

C) $3.85 \times 10 ^ { 14 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

D) $6.50 \times 10 ^ { 26 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

Question

It is estimated that a certain beach has $5 \times 10 ^ { 19 }$ grains of sand. The beach has an area of $1.3$ million square feet. How many grains of sand are there on average per square foot of sand? Round to 3 significant digits.
A) $6.50 \times 10 ^ { 25 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

B) $3.85 \times 10 ^ { 13 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

C) $3.85 \times 10 ^ { 14 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

D) $6.50 \times 10 ^ { 26 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

Quizplus · Accepted Answer

The Answer of It is estimated that a certain beach has $5 \times 10 ^ { 19 }$ grains of sand. The beach has an area of $1.3$ million square feet. How many grains of sand are there on average per square foot of sand? Round to 3 significant digits.
A) $6.50 \times 10 ^ { 25 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

B) $3.85 \times 10 ^ { 13 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

C) $3.85 \times 10 ^ { 14 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

D) $6.50 \times 10 ^ { 26 }$ grains of sands per $\mathrm { ft } ^ { 2 }$

It Is Estimated That a Certain Beach Has 5×10195 \times 10 ^ { 19 }5×1019

It Is Estimated That a Certain Beach Has $5 \times 10 ^ { 19 }$