Ill mark brainilest if correct What is 221,000,000,000,000,000,000 expressed in scientific notation?
2.21 × 1021
2.21E20
2.21E21
2.21E-20
2.21 × 10-21
2.21 × 10-20
2.21 × 1020
2.21E-21
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Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

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